In 'Chrono Chums: Who's There?', players take on the role of a time-traveling historian named Tessa, who navigates various historical timelines to investigate bizarre anomalies caused by a mischievous time spirit. Armed with quirky gadgets and clever dialogue choices, Tessa meets eccentric historical figures, unravels mysteries, and forges unlikely friendships across centuries. The narrative evolves based on players' choices as they balance humor and drama while trying to restore the timeline without losing their sanity—or their friends.