Tracy Borman and Jason Watkins explore the mystery of what happened to the two young princes that were brought to the Tower of London in 1483 by their uncle Richard, Duke of Gloucester. A few weeks later, the two boys vanished without a trace. Jason treads the boards as Shakespeare's greatest villain, Richard III, to try to get inside his mind, while Tracy investigates the discovery of the bones of two children found at the Tower in the 1600s.