"Pirates of the Caribbean: At World's End" is the third film in the Pirates of the Caribbean series, released in 2007. The story follows Captain Jack Sparrow, Will Turner, and Elizabeth Swann as they embark on a quest to rescue Jack from the Davy Jones locker and confront the powerful East India Trading Company. The film features a climactic battle between pirates and the British navy, highlighting themes of loyalty and freedom. It introduces new characters like Captain Sao Feng and explores the complex relationships among the main characters, culminating in a showdown that determines the fate of piracy in the Caribbean.