The evil space pirate Gloomius Maximus is determined that since he can't have fun, nobody else will either. Unfortunately for our heroes, an invitation to Zowie Polie's third birthday party accidentally finds its way to Gloomius's ship. Gloomius never had a birthday party himself, so he sets out to make Zowie's as miserable as possible. He tries a glum ray, kidnapping Zowie and Pappy, and ultimately towing the entire Polie Planet to the Gloomy Galaxy. Between Olie's Super Silly Ray (his present to Zowie) and some help from Saturday morning hero Space Boy the day is saved for silliness. The whole planet helps charge up the Super Silly Ray and fix Gloomius's happy gear.

Rolie Polie Olie, winner of the 2000 Emmy Award for outstanding special class animated program, presents a trio of episodes--one of which is perfect for Valentine's Day. In "Happy Hearts Day," Olie and Billy turn up their noses at Zowie's extensive preparations for "Gooey Hearts Day." When Mrs. Polie sets up a play date with the new neighbor girl, Polie Pi, the boys are initially begrudging. A quick bite by the "looove bug" soon has the boys competing with one another and showing off to impress Polie Pi, but this results in Polie Pi feeling sad and left out. "Top Dog Fish" finds Olie and Zowie enamored with the class fish they're caring for over the weekend and has pet dog Spot desperately begging for attention. In "Mom's Night Out," Mrs. Polie is off for a few sets of bowling while Pappy and the kids have a barbeque in the back yard. After promising not to leave a mess, the trio decides to make a 17-layer cake that leaves the kitchen in a shambles.

Several innocent persons are hurt after two robbers, fleeing from the police, run into a neighborhood cafe.