As the first Japanese detective game, Raincode offers a brand new style of gameplay that combines traditional detective games with the fun of puzzle games.

Yuma, the main character, is a Japanese high school student. He is a trainee detective at the Raincode Agency, where he meets with his partner Shinigami.

The mystery case takes place in the city of Raincode, where the megacorporation has a mysterious plan that involves the city, its citizens, and the world's elite. The megacorporation is trying to hide the truth from the public, but the case will be revealed to the public in the near future.

The main character is a trainee detective, and the first thing he has to do is to investigate the case.