Tom and Tish are travelling back to the Middle Ages and nothing will ever be the same again! When two ordinary children stumble across a mysterious barrel they find themselves travelling back in time, and are suddenly thrust into a fight to the death to save the world from the clutches of an evil time-changing mastermind called Alisha. With only the erratic advice of an agent from the Special Time Division and their own wits to help them, Tom and Tish are in for the adventure of a lifetime!