In 'Chrono-Chums: Who's There?', players take on the role of an ordinary teenager who accidentally stumbles upon a mysterious pocket watch that allows them to communicate with historical figures throughout time. However, a mischievous time-traveling prankster known only as 'The Jester' has begun to meddle with history, leading to bizarre and comical alterations in the timeline. Players must interact with famous personalities—ranging from Cleopatra to Einstein—to gather clues, resolve mishaps, and ultimately confront The Jester before the fabric of history unravels. With multiple endings based on the decisions made, players experience adventure, humor, and a touch of drama as they navigate through different historical epochs.