Porky Pig and his loyal cat Sylvester move into a big scary looking house and Sylvester (who doesn't have any dialogue in this 'un) is instantly panicky and afraid. He's sure the house is over-run with homicidal mice, booby traps and ominous shadows. However Porky doesn't appear to be listening and insists Sylvester sleep in the kitchen and not beside him, where he feels more safe.
Sure enough, it's not long before the mice are poking at and prodding Sylvester with sharp objects or launching the poor kitty through windows. Despite repeated attempts, Porky will just not pay attention until he himself is kidnapped.
Now it's up to Sylvester to rescue him in an unusual role as the victim turned hero. You gotta love him, he's just so adorable.