When dangerous ghost sailors led by his old adversary, the villainous Captain Salazar, escape from the Devil's Triangle, a down-on-his-luck Captain Jack Sparrow feels the winds of misfortune blowing even more forcefully as he is thrust into an all-new adventure. Jack's only chance of survival is to find the fabled Trident of Poseidon, but in order to do so, he will need to form an uneasy alliance with a smart and beautiful astronomer as well as a headstrong young man in the British navy.