Phil, a part-time truck driver and singer who wears his pants far too high, meets a feisty platinum blonde who challenges him to a drag race through Griffith Park. When he is caught and loses his license, he meets up with the sketchy Frank Wooster who offers him a job singing in his new nightclub. When Phil discovers that his new job also includes drug running, he must fight to save his friends and himself.
Three thieves rip off a shipment of used money being sent back to the US. As they are escaping the robbery (after having taken a hostage), they wind up on an island in a hotel full of demented residents.
A troublemaker returns to town only to find his old tearaway pals have joined a supervised motorcycle club. Friction erupts between him and the new leader about this goody-goody setup, and about the charms of gang moll Terry.