In an attempt to teach his son some responsibility, Peter Cottontail assigns Peter Junior to clean the Clock of Spring.

Jackie Frost (the apparent heir of Jack Frost) hates it when her handiwork melts. In cahoots with Irontail, she steals the spring of the Clock of Spring, then goes on to do the same for the clocks of Summer and Fall, so that winter will never end.

Peter Junior must travel to Winter Ridge (making a few friends along the way) and face the villains so that spring--and Easter--can return to April Valley.