A young boy named Yugi Muto defeats the world Champion, Seto Kaiba, in a duel with the help of the mysterious Millenium puzzle,the support of the friends and the heart of the cards. Yugi then becomes famous around the world. Yugi and his friend Joey participate in Duels to help save family members. All the way Yugi and the spirit within the puzzle try to understand each other more. Seto Kaiba tries to regain the title he once had. Many characters pop in and out, many are duelists and it makes for some interesting battles.