The premise of Kingdom Hearts 358/2 Days focuses on Roxas, the "Nobody" of Sora. Created when Sora temporarily lost his heart in Kingdom Hearts, Roxas has no memories of his past. He is recruited into Organization XIII—a group of beings without hearts seeking to become whole again.The narrative bridges the gap between the original Kingdom Hearts and Kingdom Hearts II. The title is read as "Three-Five-Eight Days over Two," reflecting the story of two individuals—Roxas and Xion—over the course of 358 days.Life in Organization XIIIXemnas, the leader of Organization XIII, appoints Roxas as the 13th member. Roxas is tasked with traveling to various Disney worlds to defeat the "Heartless" and gather their hearts. These hearts are collected to construct a synthetic Kingdom Hearts, which the Organization believes will grant them genuine emotions and human lives. Bonds of FriendshipBecause Nobodies are traditionally incapable of feeling, Roxas’s growing emotional awareness makes him unique. After missions, he regularly retreats to a clock tower in Twilight Town with his fellow Nobody, Axel. There, the two sit atop the building, watching the sunset and eating sweet and salty sea-salt ice cream, discussing whether or not they possess real hearts.Their routine shifts when Organization XIII introduces Xion as its 14th member. Like Roxas, she is a Keyblade wielder. Xion joins the duo, cementing a tight trio of friends who bond over their shared daily ice cream tradition.The Existential Crisis As the narrative progresses—coinciding with the events of Kingdom Hearts: Chain of Memories—Roxas begins to question his purpose and identity as he experiences mysterious, fragmented dreams of a boy named Sora. Simultaneously, a dark revelation comes to light: Xion is not an actual Nobody, but rather an artificial replica puppet created by the Organization to siphon Roxas’s power and copy his Keyblade abilities. Because Xion was inadvertently created using fragments of Sora's most potent memories (particularly those of Kairi), she absorbs parts of his mind. This drain causes Roxas's power and memories to fade while Xion grows stronger. The Tragic ClimaxThe revelation of Xion's true nature pits her, Roxas, and Axel into a spiral of conflict and tragedy. As Naminé and DiZ work to reconstruct Sora's memories in Castle Oblivion so he can awaken, they determine that Xion’s existence actively threatens this process. Xion ultimately realizes she must merge with Sora to restore him, leading to heartbreaking clashes with her friends. Ultimately, Xion is destroyed, causing everyone—including Roxas and Axel—to lose all memories of her. Overcome with grief and anger over his forgotten existence and manipulated purpose, Roxas lashes out at the Organization and attempts to free Sora himself. The Path to Kingdom Hearts IIRoxas’s journey culminates in a fateful battle with Riku. Riku defeats Roxas and strips him of his freedom, putting him in a simulated, virtual replica of Twilight Town constructed by DiZ. This brings the premise to the exact opening hours of Kingdom Hearts II, where Roxas spends his final, unaware "seven days" of summer vacation before merging with the true Sora. And Chain Of Memories.