Marine Sergeant Terry Gardner, a former private detective and former champion wrestler, tangles with some Germans, who seek to murder Wilmer, the man Gardner is protecting. A gypsy is killed. The gypsy's parrot, named Snoopy, helps Gardner to avenge his owner's death.
Snoopy visits Gardner and inspires him by giving him a card telling him that "At Twilight you will be Master." Thus inspired, Terry buys a costume for himself and begins fighting crime as Twilight.