在圣巴勃罗海滨，一场醉酒狂欢后，鲍勃担心他可能杀害了一名男子，由于不确定，他需要到孤立的船上找一份工作。那天晚上，他救了企图自杀的安娜并把她带上了船。但是鲍勃的伙伴Tiny想驱逐安娜，担心她会破坏兄弟之情，而尚未解决的谋杀悬疑正是Tiny所需要的借口，海面上四伏着浓雾与邪恶...

A mad doctor named Zanoff uses a drug to bring himself back from the dead after his execution in prison. Dick Tracy sets out to capture Zanoff before he can put his criminal gang back together again.

Truck drivers Steve Hackett and Bill Purvis are fired from their jobs with the West Coast Trucking company for not using second-gear going down steep grades. Davis, the company vice-president, surprisingly asks them to carry a load of merchandise to Arrowhead and offers a $1000 bonus. He tells them it is a load of lettuce. Several miles out of Los Angelese, they are stopped by a mob of lettuce-farm workers on strike. When the first crate is tossed off the truck, it explodes and the two pals learn their merchandise is a cargo of dynamite. The workers let them proceed and they crash into a car driven by Mary Stevens, whom they had met at a restaurant. She and her dog, "Butch" (played by a Credited dog named Stooge), join them and they deliver their cargo, and learn unscrupulous real-estate operators have jammed the locks on the dam in order to ruin the ranchers and farmers and take over their property.