In 'Chrono Chums: Who's There?', players assume the role of Timmy Tick, a whimsical, time-hopping eco-conspiracy theorist, who stumbles upon a series of interconnected timelines where friends from his past are mysteriously disappearing. As Timmy, you jump through different historical events and alternate realities, gathering clues, forming alliances with historical figures, and uncovering a plot that threatens the fabric of time itself. Along the way, you'll face humorous dilemmas, confront bizarre challenges, and decide the fate of both your friends and history itself.