“Cat burglars” are nothing new, but these burglars are actual cats! Having perpetrated a rash of thefts, they’ve stashed their loot in a series of abandoned mansions. You’re Mappy – the city's finest police officer – and you've been chosen to crack the case! Unfortunately, you’re also a mouse... and you’re outnumbered. This is not going to be easy!

Your mission is to infiltrate the cat burglars’ lairs and retrieve the stolen loot. You won’t be able to apprehend the cats, but you can stun them by slamming doors on them and turning their own booby-traps against them. But don’t let them catch you – if even one of those cats gets their paws on you, you’ll be cat chow!