that she possesses Will's gold medallion that she took from him after his rescue, fearing it marked him as a pirate. Invoking parley, Elizabeth negotiates with Captain Barbossa to leave Port Royal in exchange for the coin. He agrees but keeps her captive on a technicality after she identifies herself as Elizabeth "Turner", mistakenly believing her blood can break an ancient Aztec curse the pirates are under. Their true forms — immortal skeletons —can only be seen in moonlight. Will's love for Elizabeth motivates his actions and helps drive the story; he will do anything to save her, including piracy. And though the peaceful and law-abiding Will despises pirates and distrusts Sparrow, he frees him, knowing only Sparrow can locate Isla de Muerta, the secret island where Elizabeth is being held. Will is unaware, however, that Jack Sparrow is the Black Pearl's former captain and that he has an ulterior motive for helping him: Turner blood and the gold medallion can break the Aztec curse—Sparrow intends to barter Will to Barbossa in exchange for the Black Pearl. When Will and Elizabeth escape Isla de Muerta, Barbossa pursues and captures their ship, sinking it. Will and the crew are thrown in the Pearl's brig, while Elizabeth and Sparrow are marooned on a deserted island. Elizabeth's feisty, self-sufficient nature propels her into taking action for their rescue by burning a cache of smugglers' rum. The towering smoke column is spotted by Commodore Norrington aboard Dauntless. To rescue Will, Elizabeth convinces Norrington to attack Isla de Muerta by impulsively accepting his previous marriage proposal. The commodore doubts her sincerity, though Elizabeth apparently intends to honor her promise, sacrificing her own happiness to save Will. She says nothing about the curse while Sparrow provides the bearings to Isla de Muerta, setting his own plan into motion. At Isla de Muerta, Elizabeth frees Sparrow's crew from the Pearl's brig, naively believing they will rescue Will and Sparrow. Abiding by the pirate code that, "any man who falls behind, is left behind," they instead commandeer the Black Pearl and set sail, leaving a disgusted Elizabeth to rescue Will and Sparrow alone. As the navy battles the pirates, Sparrow duels Barbossa inside the treasure cave, while Elizabeth joins Will in fighting the remaining cursed crew. Sparrow fatally shoots Barbossa, who, upon reverting to mortal form as the curse is lifted, falls dead. The surviving now-mortal pirates surrender.