Harry has just got a pet cat, Mr Tiddles, and wants to make him happy. Mr Tiddles tries to reciprocate, bringing tiny gifts — maybe expired mice and the like — to show his affection. However, one morning Harry wakes up to find his bedroom completely overrun by surprising “presents”: a train set, priceless works of art, dinosaurs, robots, and even a horse. It becomes clear that Mr Tiddles’s generosity has gone wildly out of control!