Leo Kohlmeyer is a talking cat who inherits $5 million from his late owner and is looked after by the owner's in-laws whose two children, Bart and Veronica, learn Leo's secret that he can talk, while a bumbling, but devious, couple called the Rigsbys plot to kidnap Leo in order for them to gain the inheritance money for themselves.

A conniving Broadway producer and his meek accountant plan to profit from charming wealthy old biddies to invest in an overbudget production, and then put on a sure-fire disaster, so nobody will ask for their money back — and what's more disastrous than a tasteless musical celebrating Adolf Hitler.