People used to call them 'friends' and said that they were good for your brain. And then a day came when all that changed when they became the enemy.Now, anyone found harbouring a rogue imaginary person is in for the Cosh - an operation that fries the imagination and zaps whatever's in there out of existence. That's why Joseph wishes Klaris Cliff had never shown up, and why he knows that proving her innocence is the last hope he has of saving himself and his friend Flea. As Joseph turns detective to avoid the Cosh, he finds about more than he had bargained for about Klaris and what she means to him.