On the outskirts of Whoville lives a green, revenge-seeking Grinch who plans to ruin Christmas for all of the citizens of the town.

In this sequel to the action comedy K-9, Detective Mike Dooley and his trusty canine companion Jerry Lee get two new partners - a Doberman Pincher named Zeus and his new trainer.

A bunch of high school misfits in Hawaii, introduced by their new teacher, attend a science fair in which they draw up inspiration to build their own solar car and win a trip to compete in the 1990 World Solar Challenge in Australia.