The plot of Doraemon: Nobita no Takarajima involves the beloved characters embarking on a voyage to the Caribbean Sea. Nobita assumes the role of captain and engages in battles with his foes, while Shizuka falls victim to abduction and a savage storm halts her rescue. However, once they finally reach the enigmatic Treasure Island - the location where Shizuka is being held captive - it becomes clear that the island is not your run-of-the-mill getaway.