PLOT: Jonah and Chip barely have time to adjust to the knowledge that they are missing children from history when Chip and another boy, Alex, are hurtled back to their rightful time period. Desperate not to lose their friends, Jonah and Katherine grab on for the ride. When they arrive in London in 1483, Chip and Alex finally learn their true identities: the missing princes from the Tower of London! JB promises that if the kids can set history right, they can return home to their present-day lives. But how is that possible if, in original time, Chip and Alex were supposed to die?