Sora is a young energetic boy looking forward to exploring the world with his friends, Riku and Kairi. The threesome is working hard on completing a raft that will allow them to leave their island but one day a mysterious force causes Sora to gain a special weapon known as the Keyblade. He fights some weird monsters and gets transported to a strange town. Meanwhile, Donald and Goofy leave their castle to search for the king and the chosen one who holds the "key" to saving the world. Sora is attacked again by creatures known as Heartless but is helped out by an old man named Cid and a warrior named Leon. He eventually meets up with Donald and Goofy and they join forces to go search for his friends and the King. 
(Source: Tokyopop)

Sora is a young energetic boy looking forward to exploring the world with his friends, Riku and Kairi. The threesome is working hard on completing a raft that will allow them to leave their island but one day a mysterious force causes Sora to gain a special weapon known as the Keyblade. He fights some weird monsters and gets transported to a strange town. Meanwhile, Donald and Goofy leave their castle to search for the king and the chosen one who holds the "key" to saving the world. Sora is attacked again by creatures known as Heartless but is helped out by an old man named Cid and a warrior named Leon. He eventually meets up with Donald and Goofy and they join forces to go search for his friends and the King.

The door to Kingdom Hearts was sealed, dealing a blow to the heartless and restoring the worlds to normal, but Riku and King Mickey were trapped inside! Now Sora, Donald, and Goofy's search for their friends leads them to the mysterious Castle Oblivion, where a hooded figure tells them, "Ahead lies something you need, but to claim it, you must lose something dear." What could be more dear than their very memories themselves? And what do the shadowy members of Organization XIII want with them? (Source: Tokyopop)

The pitiful Heartless crave for hearts. The rage of the Keyblade unleashes those hearts. Hearts gather in the darkness, and eventually create Kingdom Hearts; to create the sanctuary for those lost hearts, those are Kingdom Hearts. Roxas, without any memory regarding his past, has been accepted into the Organization XIII. The privilege of becoming a member of the Organization XIII comes the responsibility that each member upholds. However a question arises: "Why am I in the organization?" On top of the clock tower with the sunset in the horizon, the 14th member, a young girl, makes this question. Who is this young girl, and how does she fit into the plot? This is the revitalization of Kingdom Hearts; the new prequel that connects the puzzle pieces of the mysteries that still float about. This is Kingdom Hearts: 358/2 Days! 

Long ago, in the "age of fairy tales," the world's light is protected by seven individuals who reside in Daybreak Town and wield unique weapons called "Keyblades": the Master of Masters and his six apprentices. A devastating conflict has been foreseen, and the world's end is imminent. In order to heal it, the Master of Masters gives his disciples unique roles and instructs them to form Unions comprised of other Keyblade wielders. Soon afterwards, the Master vanishes.
 
(Source: KH Wikia)

Tags