In 'ChronoChums: Who's There?', players dive into an unconventional narrative mystery where they embody a group of quirky friends who have accidentally stumbled upon a time-bending device in their attic. Instead of traditional powers, they can only communicate with their past selves through letters, and gather information to solve the mystery of their friend's sudden disappearance. Players must piece together clues across various timelines while managing their friendship dynamics, making decisions that can alter their relationships, and ultimately reveal the truth before time runs out. Expect unexpected twists, hilarious banter, and a touching exploration of friendship and choice.