The rip-roaring adventure finds down-on-his-luck Captain Jack feeling the winds of ill-fortune blowing strongly his way when deadly ghost sailors, led by the terrifying Captain Salazar escape from the Devil's Triangle bent on killing every pirate at sea - notably Jack. Jack's only hope of survival lies in the legendary Trident of Poseidon, but to find it he must forge an uneasy alliance with Carina Smyth a brilliant and beautiful astronomer, and Henry a headstrong young sailor in the Royal Navy. At the helm of the Dying Gull, his pitifully small and shabby ship, Captain Jack seeks not only to reverse his recent spate of ill fortune, but to save his very life from the most formidable and malicious foe he has ever faced.