In 'Who's This? A Mystery Mix-Up', you play as an overworked private investigator with an uncanny knack for misidentifying people. When a famous heiress goes missing at a high-society gala, you're tasked with piecing together the tangled web of relationships and absurd secrets surrounding the elite guests. Utilizing humor, puzzles, and a cast of eccentric characters, you must navigate through misunderstandings, bizarre conversations, and colorful confrontations to uncover the truth. As each player interacts with the dynamic dialogue system, the identity of the villain may shift based on choices, leading to multiple unexpected endings.