Sailing across the Caribbean, Hector Lynch falls into the hands of the notorious buccaneer, Captain John Coxon, who mistakes him for the nephew of Sir Thomas Lynch, Governor of Jamaica. Hector encourages the error so that his friends Jacques and Dan can go free.

Coxon then delivers Hector to Sir Henry Morgan, a bitter enemy of Governor Lynch, expecting to curry favour with Morgan, but is publicly humiliated when the deception is revealed. From then on, Hector has a dangerous enemy, and Coxon seeks to revenge himself on Hector . . .

Befriended by Jezreel, an ex-prize fighter, Hector meets up again with his friends Jacques and Dan, and the four comrades join the great buccaneer raid, which marches through the jungle along the Panama coastline. But their expedition is soon interrupted - with deadly consequences.