Jackie Ryderbeit, with licence to kill, is tossed into a cauldron of International intrigue with orders to find and eliminate a double agent. With the help of a booze-sodden ex-courier and an over-the-hill trigger- man he casts for a shark only to find a whale on his line. The story reaches a shattering climax on the blue waters of the Mediterranean after a chase through the confused currents of cross and double-cross.