In a quirky town where shadows have minds of their own, players become Detective Lumi, a sharp-witted investigator who talks to shadows to unravel a series of bizarre events. Each shadow offers cryptic clues, revealing secrets about their human counterparts. As players choose dialogue options and paths, they must piece together the mystery of a missing person who was last seen conversing with their shadow. The interactive narrative allows players to explore relationships, comedic encounters, and unexpected twists while navigating a world where shadows hold the key to the truth.