The game takes place exclusively in Kardia, a small city on the eastern tip of the Adonia continent which is surrounded by farmland. The game opens with the protagonist, Raguna, wandering into town. Starved and dehydrated, he collapses in front of the house of a landowner named Mist. Raguna suffers from amnesia, and has no idea who he is or where he came from. Mist discovers him outside her home, fetches him food and water, and because he doesn't know his name, they both decide to name him "Raguna" (changeable). Afterwards, Mist offers Raguna a house on her land if he promises to work the farm. Raguna accepts, and this is where the game begins.
From then on, the game is very open-ended. The player can work on the farm, fish, or explore the caves in the wilderness around Kardia. The player can propose to some of the eligible girls in town, capture monsters, and expand the player's house. In short, the player is free to do what he desires, but the storyline will not progress if new caves aren't opened up and cleared by beating the boss at the end. As the player fights their way through the caves, he slowly unfolds the mystery of the monsters attacking the village, and also begins to try and regain his memories of who he is and where he came from.