In the serene surroundings of Destiny Islands, three companions – Sora, Riku, and Kairi – yearn for adventures beyond their home. Their desires swiftly materialize when malevolent entities known as 'Heartless' invade, plunging the islands into darkness and separating the trio. Just as despair looms, a radiant Keyblade emerges, empowering Sora to combat the Heartless menace. Simultaneously, in the realm of Disney, the absence of King Mickey Mouse prompts concern among the inhabitants. Leaving a cryptic message behind, Mickey embarks on a mission to confront a looming peril that threatens all realms. He tasks his loyal companions, Donald Duck and Goofy, with locating the bearer of the 'key' – the savior destined to avert catastrophe. Thus, Donald and Goofy journey to Traverse Town, their first destination. Meanwhile, Sora awakens in the same town overrun by Heartless. While his priority remains reuniting with his friends, the responsibility of wielding the Keyblade compels him to embrace his pivotal role. As countless worlds face dire threats, Sora and the Keyblade stand as the sole beacon of hope for their salvation.