Gambling boss Greg Morella runs a crooked ship-- all the gaming tables on his floating casino are rigged. Because the ship operates outside of the three-mile state limit, the authorities can`t get the evidence they need to convict Morella. Roving reporter Jim Carver thinks he can get the goods on the kingpin. He enlists Morella`s secretary Laurie to help him secure evidence of the fixed games as well as proof that Morella murdered his partner Max Gates.