Tom Canty is born into a poor family in London on the same day that Edward Tudor is born to the wealthy royal family. Tom grows up with his only desire being to see a real prince. One day while wandering outside of London, Tom sees Prince Edward and is able to get a good look at him. The prince takes a liking to Tom and invites him into the palace, where the two boys discover they look identical. This chance meeting kicks off a series of events where the boys end up switching places with unexpected consequences.