When a mysterious door is unlocked, and a violent storm hits down on a small tropical island and young Sora Caelum (Winslow Fegley) is separated from his two closest friends Riku Jones (Thomas Barbusca) and Kairi Santaura (Kiawentiio) and including his whole family too as well, after the storm scatters the three kids into countless unknown worlds which Sora lands in a world called Traverse Town. After arriving a mysterious race of beings have invaded; they are known as the Heartless: those without compassion. Sora later finds out that he has been chosen as the master of the Keyblade, the only weapon with the power to vanquish the Heartless and their dark intentions. Meanwhile, an unknown high council of mysterious rulers have bound together to control the Heartless, and meeting up with Court Wizard Donald (Tony Anselmo) and Captain Goofy (Bill Farmer) and are both out to find King Mickey (Bret Iwan) after he went missing and they need Sora's help to find him, later on they aboard a Gummi ship that could travel to other worlds. Sora decided to go with them in order to continue his journey and find his missing pals and with his Keyblade, the trio travel into the multiverse Sora, Donald, and Goofy join forces and help familiar Disney heroes and they team-up with them to save their worlds from the Heartless, later on Sora seeks out his lost friends and combats the armies of evil to uncover the identity of the true master of the Heartless.
