Colin wakes up one day from a snooze to find that he has the wrong shadow! No one will take Colin seriously any more. The other cats all laugh at him and the beaky birds don't even look up from their bath! Then Colin solves the mystery - Vernon the mouse had switch-swapped shadows with Colin as Colin's cat shadow gives him confidence and makes him feel important. Can Colin persuade Vernon to switch-swap back and show his new friend that everyone is important?