A submarine commander in World War II is sent to retrieve a Japanese mine for the military to study and analyze, but when he loses one of his men in the effort, he is accused of doing it on purpose as the lost man supposedly made advances on the commander's girl.

Nixon escorts Khrushchev in Sokolniki park for opening of Moscow Fair, "crackling exchange" finished in front of Ampex tape recorders, "wave bye-bye", clips from debate (partial newsreel).