Sora's world is shattered when a violent storm hits his home, and is seperated from his two closest friends. The storm scatters the three to unknown worlds. At the same time, there is turmoil in the Disney Castle. King Mickey is missing, and Court Wizard Donald and Captain Goofy are out to find him. On their travels they meet Sora, on his own search for his lost friends. The three are told of ominous creatures called Heartless, being without hearts derived from an unknown dimension and are the ones responsible for the devastating storm. The Disney villians, enticed by the power of darkness, manipulate the Darkness to help them gather the princesses of heart, who are needed to open a mysterious final door. Upon discovering the link between the Heartless, the storm, and the disappearance of King Mickey, Sora, Donald, and Goofy join forces and help familiar Disney heroes to save their worlds from the Heartless.
