In a world where people can 'borrow' hearts to experience different emotions, you play as a heartless detective in a city plagued by identity crises. Your task is to solve a series of dramatic mysteries by interacting with various characters who each possess borrowed hearts—each affecting their personalities and motivations. As you piece together clues, you'll unearth a conspiracy tied to an underground market of hearts, uncovering the question: What does it mean to truly feel? With each choice you make, your relationship with the characters changes, leading to multiple branching storylines and endings based on the connections you forge and the hearts you reclaim.