In the vibrant city of Lumino, shadows have developed lives of their own, escaping the confines of their owners. Players take on the role of Sam, a quirky private investigator with a knack for uncovering bizarre mysteries. As players journey through the enigmatic streets, they must solve puzzles, gather clues, and interact with shadowy figures to discover the truth behind this paranormal occurrence. Unravel the backstories of different shadows and their owners, forge alliances or rivalries, and ultimately confront a malevolent force that aims to plunge Lumino into eternal darkness.