After a young woman is attacked in the elevator she meets her neighbours (two brothers) for the first time. One of the brothers has a secret, the other has a crush on her. Her analyst tries to help her over the attack, but when she is invited to a mysterious apartment things get worse and worse.

Some time after the Mousekewitz’s have settled in America, they find that they are still having problems with the threat of cats. That makes them eager to try another home out in the west, where they are promised that mice and cats live in peace. Unfortunately, the one making this claim is an oily con artist named Cat R. Waul who is intent on his own sinister plan.