Rosanna Barclay has arrived in Port Royal from England, in search of her missing father. Upon arrival, she meets wandering scoundrels Kestrel and Scar, whom she hires as bodyguards.
She soon learns that her father was a pirate who disappeared after attacking a French payroll carrier. Worse, he double-crossed a powerful information broker who had originally bankrolled the theft.
Rosanna and her companions bluff their way aboard a pirate vessel in order to reach the island where the treasure might be. But their new captain isn't in favour of a treasure hunt, and the broker's agents are close behind.