In the future, mental institutions are located on far-away planets. One such planet is the apex for an invasion of Earth by rodent-like aliens. It is up to a band of intrepid mental patients to thwart their evil schemes.

Since the death of her husband 10 years ago, Evelyn has been working hard for her company, but had no private life. Now her doctor shocks her with the news that she may live only another 6 months. Spontanely she follows a TV ad and sets out for vacation in Mexico. There she meets widower Lloyd and they fall in love, go bungee jumping... until she gets another diagnosis from her doctor.