 Here is a mystery that will keep you guessing. Trans-American Airlines have lost three of their very latest high-speed air mail planes under very mysterious circumstances. In each case, the pilot, flying over a very dangerous country reported motor trouble and was forced to save his life with his parachute. Upon locating the wreckage, airline and postal authorities discovered a very valuable shipment of bonds and securities to be missing. The Department of Justice has assigned Miss Irene Delroy, the suburb girl operator, and her assistant Fitzgerald to the case. The mysterious crashes have also attracted the attention of Jimmy Gifford, roving newspaper reporter, an old friend of Miss Delroy. The finger of suspicion seems to point to Andy Andrews, the cracked pilot of Trans-American Airlines, who was piloting each ship. Ernest Powers, general manager of Trans-American, has ordered the westbound passenger ship to land at Salt Flats, an emergency landing field so that Miss Delroy, Fitzgerald and Gifford can investigate the passengers, one of whom they believe to be implicated in the robberies. The special plane bearing the trio is just landing at Salt Flats. He's coming in pretty high, if you ask me. Don't worry about that, Fitz. You'll have enough to worry about when you get on the ground. Can you see the westbound plane down there, Miss Delroy? Yes, but it will be the hangar. I hope this pilot knows the field. It don't look none too good. Stop worrying, Fitz. He's leveling up now. Three points. Clean as a whistle. I'm glad that turned out all right. Don't forget, Sergeant. They say any landing you can walk away from is a good one. You're telling me? Hey, I knew a guy in France once during the war. I'm afraid we won't have time for that, Fitz. No, ma'am. He's a lot to do when we taxi over to that ship. Did you get the descriptions from the radio man back at the airport? You mean the guy who had gassed him and looted the filing cabinet? Yes, Fitz. Sure, I got it. We can't miss him. He's got a scar over his left eye. Dark complexion? A little guy. Who are they? He'll be easy this spot. Do you think the man we're after had a hand in those crashes, I think? I don't know, Jimmy. But I do know we're not going to overlook any evidence. I should say not. You know, that guy had a reason for looting them filing cases, even if he did only take the air company's operation schedule. Did it ever occur to you that he might have taken something else, Fitz? You were power told, is it? Power might not have told all the truth. What are you getting at? I'll explain later. Here we are at the hangar. Yeah, and there's a passenger plane waiting for us over there. See? Open the door, Gifford. Right, Sergeant. Hey, who's this fellow running over this way? It's probably the airport manager. He'll want to call his patch of rough ground in the airport. Mr. Roy. Yeah? I'm Lars, the soft flesh radio operator. We've been holding 610 for you. Good. Any of the passengers objecting? All of them, ma'am. They've been howling their heads off, going to sue the company and everything. They don't realize how serious this matter is. Have you allowed anyone to leave the ship? No, ma'am. Mr. Powers was very emphatic about that. We had a lot of trouble with one of them. He insisted on getting off. Said we had no right to hold him. What does he look like? A little dark shrimp. Got a nasty scar over his eye, black hair. He insisted we had no right to hold the ship. Oh, yeah? Oh, we'll see about that. Where is he? Not so fast, Sergeant. How many passengers on the westbound, Lawrence? Eight, ma'am. We're carrying a light payload tonight. Any other dark, infected men aboard? Only three men aboard, ma'am. Five women passengers heading for a convention of women's clubs somewhere. Oh. They're plenty hot. I don't doubt it. What do the other two men look like? They both big men. A fighter, kid something or other, and his manager. Over six feet, I'd say. Probably some fighter in his shoes getting together for a set up somewhere. They won't be your men, Irene. No, ma'am. But that little guy answers to the description. He's the guy we're after, sure as shooken. May we use your radio room for a few minutes, Mr. Lawrence? Sure, ma'am. It's kind of messed up. I live out here by myself most of the time. Oh, it'll be all right, I'm sure. Fitz. Yes, ma'am? You go with this gentleman and get the suspect. Yes, ma'am. Need any help, Sergeant? Or what? Sorry, Sergeant. I must have had someone else in mind. You shouldn't tease Fitz that way, Jimmy. He's really quite capable. Let's walk over to the shack. You think this fellow will turn out to be the guy that stole the trans-American operation schedule? He certainly answers the description. Well, how about the pilot? Andrews. He couldn't have had a hand in the Jimmy. He was with us. That's right. Well, then maybe he is. The only thing I'm hoping right now is that Andrews gets the Eastbound Mail plane through OK. Why? I haven't told anyone but you, Jimmy, that Andrews was carrying $60,000 in his mail shipment tonight. Gee, that's right. Boy, it would be tough to lose that. Oh, I'm just hoping he'll get through all right. It's a terrible risk, Jimmy, but I had to do it. Why? Well, to draw the criminal out into the open. That shipment was made with the greatest secrecy. You and Fitz and I were the only ones beside the bank officials to know about it. You figure if there's an attempt to steal it, it'll give you a more definite line on the criminal. I'd rather see it get through safely, but if it is taken, you can rest assured it'll eliminate a lot of things that are worrying me now. Here's the house. We'll go on in. Not a bad little place to live. But I need to be stuck out here in one of these radio shanks. Rather lonely life, I'd imagine. Just the place for a fellow who's been unlucky and loved to come and forget. You know, I'll be taking one of these jobs unless you break down and agree to marry me. There you go, proposing again, Jimmy. You'll catch me off my guard one of these days. Well, don't waste any time and don't give me none of your facts, though, either. We want to ask you some questions and you're going to answer them. Here he is, Mr. Delroy. So you're the dame that's responsible for me being taken off of that ship. I'll have you know. You won't have us know nothing. One more yappa to you, and I'm going to put this fist on your throat. Nice work, Sergeant. You were detained by Department of Justice orders. What's your name? Pirelli. Joe Pirelli. What do you do, Mr. Pirelli? What's it to you? Want me to pop him, ma'am? Now, that won't be necessary, Sergeant. Mr. Pirelli is an intelligent man. This is serious business, Mr. Pirelli. Unless you answer my questions, I'll have to order your arrest on a charge of grand fest. Well, what do you want to know? What is your business? I work for the Skelly Glass Company. We make beer bottles. What were you doing in the operations office of this airline tonight? What office is it? Listen, Mr. Pirelli, we have the testimony of the radio operator back at Metropolitan Airport that you were seen in the general offices of that company tonight shortly before the ship took off. That's a lie. We won't discuss that. But I'm inclined to believe that it might be the truth that you'd be more willing to answer our questions. I'm answering your questions. I wasn't in no office. What time did you arrive at the airport tonight? 10.30. And the westbound left at 11.10, right, Jimmy? That's right, Irene. Well, what are they? What were you doing between 10.30 and 11.10? Nothing much. Went over to the lunch stand and got a sandwich. And then? Oh, just sat around waiting. That's all. There's nothing wrong in that. Ah, listen, I've stood enough of you. I've got an important call to make in the city tomorrow. I'm not going to miss it, see? You'll miss more than one appointment unless we can get a satisfactory story from you. Where did Pips go? Back to the ship for something. Get him for me, will you, Jimmy? Sure. Oh, here he comes now with a suitcase. Oh, yes. Find anything, Pips? Nothing much. Hey, this suitcase belonged to you, Pirelli. Sure. My name is on the claim check. It's a pretty nice suitcase, isn't it? What do you mean by that? I don't believe I ever saw one just like it. How do you open it, Pirelli? Oh, what business is that of yours? Oh, nothing, especially. I'd just like to see what's inside. That's all. Well, you've no search warrant to give you that authority. We don't need no warrant, see? When we want to open your suitcase, we'll open it. There's nothing in that suitcase that will interest you. Oh, no. Listen, Pirelli, I opened that bag out at the ship. I found out that your name is Morgan and not Pirelli. And what's more, I found these in the lining. What's in those envelopes, Pips? The operation schedules. The operation schedules? Yeah, the same one this guy stole from the trans-American office. Oh, that's a lie. I don't know nothing about them papers. Let me see those papers, Pidge. Yes, ma'am. Here they are, ma'am. Mm-hmm. They're the schedules, all right. What were you doing with these papers, Pirelli? His name's Morgan, ma'am. It's all over his clothing. I found his bank book, too. That makes no difference right now, Sergeant. I want to know what you intended to do with these schedules. I told you I don't know nothing about them. Oh, yeah? Well, how come I find them hidden in the lining of your suitcase? If they were there, I didn't know anything about it. Listen, Morgan, you're in this thing up to your ears. We got a description of you as the guy we're after. And you're telling us all you know about this mess, or? Sergeant, Sergeant, look here. What is it, ma'am? This route map that I found in the schedules. Look. There is a marked in red pencil there, isn't it? Yes, but do you know where that cross is located? No, ma'am. Look. This red cross is right on the route Andrews is flying east of this very moment, right over Devil's Canyon. What's more, look at this notation. There's 655 will be over the canyon at 11 PM. Quick. What time is it, Jimmy? We've got to save Andrews. Get him to turn back before it's too late. It's 11 now, Irene. Get Lawrence to fieldman here quick. We've got to try to reach Andrews by radio. Get him to turn back. Hurry. Yeah, he's just outside. I'll get him. You think that someone knew about the money shipment and Andrews plane tonight? There's no doubt about it. Oh, I do wish it would hurry. Oh, he and Lawrence are coming now. Come on, come on, hurry. Miss Delroy wants you to get Andrews right away. Our next schedule isn't until 11 10, ma'am. We can't wait for schedule. Break in right now. Stop all traffic. It may mean saving his life. Yes, ma'am. I'll see if I can get him right now. All flats calling Andrews in 655. All flats to Andrews in 655. Go ahead. Andrews to salt flat. 655 to salt flat. Go ahead. He may be in time yet. Tell him to turn right back. Tell him to land at the nearest emergency field. Salt flats to Andrews. Miss Delroy says turn back to nearest emergency field. It's urgent. Go ahead. Andrews to salt flat. Everything wasn't fine. Tell Miss Delroy I'm going on through. Go ahead. Tell him he can't do that. Tell him it means his life. Yes, ma'am. Salt flats to Andrews. Miss Delroy says turn back regardless. It's a matter of life and death. Turn back and land. Go ahead. Andrews to salt flat. OK, running back. Tell Miss Delroy. Go on. What's the matter? Salt flats to Andrews. What's wrong, Andy? Go ahead. My motor's just tough. I have plenty of altitude. I've tried to turn it down on the canyon. I think I can make it OK. Salt flats. Salt flats. I can keep. He's gone again. Try to get him back. Go on, hurry. Salt flats to Andrews. What's the matter, Andy? Go ahead. No instruments, Delroy. I was afraid to that fit. Quick, Jimmy. We're leaving for Devil Canyon. Andrews is being forced down. We've got to stay there for shipments.