Jack reaches a deal with Barbossa to operate a pirate fleet, but suddenly frees Will and duels Barbossa, while Elizabeth and Will fight off Barbossa's crew. They refuse to rescue Will, so Elizabeth sets out on her own.
Elizabeth escapes the Dauntless and frees Jack’s crew from the Pearl. Jack plans to lure the pirates out to be ambushed by the crew of the Dauntless, but the plan goes awry when Barbossa's crew walks underwater to attack Dauntless. That night, the Dauntless arrives at Isla de Muerta. Elizabeth requests Norrington to return for Will, convincing him by accepting his marriage proposal. Elizabeth makes a smoke signal, and Commodore Norrington brings the HMS Dauntless to rescue Elizabeth and arrest Jack. Will makes a deal with Barbossa to release Elizabeth in exchange for his blood, but Barbossa exploits a loophole in the agreement, marooning Jack and Elizabeth on the island Jack was left on before. The Pearl pursues the Interceptor, taking the crew hostage and destroying the ship.
Will rescues Elizabeth and brings her to the Interceptor, while Jack is captured Barbossa and his crew and gets locked in the brig of the Black Pearl. The curse is not lifted because the medallion belonged to Bootstrap Bill, making Will the owner by bloodline. At Isla de Muerta, Will and Jack witness Barbossa sacrificing Elizabeth's blood and the final gold piece. Gibbs tells Will that Jack was captain of the Black Pearl until Barbossa mutinied and marooned him. Jack reveals that Will’s father Bootstrap Bill Turner was a pirate, who was thrown overboard while tied by his bootstraps to a cannonball. The two commandeer the HMS Interceptor and head for Tortuga to recruit a crew, including Jack’s friend Joshamee Gibbs. Jack agrees upon learning Will’s surname. Will Turner frees Jack to rescue his love Elizabeth. Elizabeth's medallion is the final piece. To lift the curse, they need to return all 882 gold pieces with the blood of the owner of each piece. Elizabeth learns that after Barbossa's crew took the treasure of Cortés from Isla de Muerta, they were cursed as immortals they appear as heavily decomposed corpses in moonlight. Elizabeth claims her last name is Turner, to conceal her identity as the governor's daughter, but Barbossa takes her prisoner. Pirates capture Elizabeth, taking her to meet Captain Barbossa for negotiations. That night, the Black Pearl, which Elizabeth saw as a child, attacks Port Royal searching for the medallion. They duel, and Jack is captured and imprisoned. Jack encounters Will, now a blacksmith and swordsman. Norrington identifies Jack, and a chase ensues. Captain Jack Sparrow comes to Port Royal to commandeer a ship, and rescues her. Eight years later, Norrington is promoted to Commodore and proposes to Elizabeth, but her corset makes her faint and fall into the sea. Elizabeth sees a ghost ship vanish into the fog. Elizabeth discovers a golden pirate medallion around his neck, keeping it so as to protect him. In the early 18th century while sailing to Port Royal, Jamaica, Governor Weatherby Swann, his daughter Elizabeth, and Lieutenant James Norrington encounter a shipwreck and recover a boy, Will Turner.