After a drunken binge on the San Pablo waterfront, longshoreman Bobo fears he may have killed a man. In his uncertainty, he takes a job on an isolated bait barge. That night, he rescues lovely Anna from a watery suicide attempt and installs her on the barge. But Tiny, Bobo's longtime pal and parasite, hopes to drive Anna away before domestic bliss tears Bobo away from him; the still unsolved murder may be just the wedge Tiny needs. There's fog on the water and evil brewing...—Rod Crawford
In California, Bobo and his mooching pal Tiny are doing odd jobs and getting drunk and they hide a secret about the unsolved murder of sailor Pop Kelly but suicidal waitress Anna, saved by Bobo, unravels the mystery.