Max the talking Tonkinese cat is terrified of Egyptian mummies, so is understandably nervous when he's transported back in time to ancient Egypt, along with his owners, twins Jemima and Joe Lancelot, and their friend Charlie. As they continue their search for the twins' missing parents who are trapped somewhere in the past, the young time-travellers arrive at the court of Tutankhamun where they uncover a plot to assassinate the young Pharaoh. Can they save his life and will they make it safely back to their own time before the plotters discover their true identities?