Professor Casper Clockwise is making the final adjustments to his time travel device when the experiment collapses entirely. Chronon — the self-appointed master of time — attacks the lab, seizes the Professor, and is accidentally dragged through the time portal along with him when the controls activate unexpectedly. The Bubble Gun falls at the feet of the Professor's son Callum, known as Rascal. He picks it up and goes after them. Pursuing Chronon through time takes Rascal from medieval Castle Hackalott through the Aztec temple at Chichimeca, the lost city of Atlantis, a pirate vessel called the Jolly Raider, and the Old West town of Dodgy City — each location's past and present both accessible, with pieces of a Time Clock to collect in each era before a final confrontation with Chronon in the Corridors of Time.