When Eddie teaches the monsters about lying, little does he realise what he has unleashed. What starts out as a tiny fib soon escalates into a series of huge whoppers, and Eddie has to play along with all of them for fear of being found out.

When Nick messes up his and Kate's wedding anniversary, she announces that he is not the man she married. So Fiend, Haggis and Norman kidnap him to find the 'real' Nick. Can Eddie and Angela persuade the monsters that it really is their dad?