A scientific experiment unknowingly brings extraterrestrial life forms to the Earth through a laser beam. First is the cigar-smoking drake, Howard, from the duck's planet. A few kids try to keep him from the greedy scientists and help him back to his planet, but then a much less friendly being arrives through the beam...

When the nefarious Dark Helmet hatches a plan to snatch Princess Vespa and steal her planet's air, space-bum-for-hire Lone Starr and his clueless sidekick fly to the rescue. Along the way, they meet Yogurt, who puts Lone Starr wise to the power of "The Schwartz." Can he master it in time to save the day?

An innocent-looking doll is inhabited by the soul of a serial killer who refuses to die.