In the Gulf of Mexico, small-time jewelry smuggler Jim Gannon is forced by gangster H. G. Danziger to use his boat to smuggle weapons into Cuba but on the return trip Jim is robbed by a strange couple of the cash owed to Danziger.

A fishing-boat owner, Jim "Brooklyn" Gannon, cuts a deal with a gangster syndicate to deliver a load of contraband firearms. The money for the transaction is stolen, and Gannon is trying to elude the gang who stole it and the ones who lost it. Trying to clear his name, he finds refuge with a family of Greek fisherman and sponge divers on the Florida coast.—Les Adams <[email protected]>