Yugi Mutou seemed destined to live life as a victim, until he solves the Millennium Puzzle, a very ancient conundrum. As a result, he begins to share his body with a gambling Spirit who knows how to fight the forces of evil. And knows how to win. This Yugi is able to discern the evil in the hearts of others through the Shadow Games, which include the Games of Darkness and the Penalty Game. With each game, the Spirit inside Yugi reveals more of himself and Yugi begins to realise that this Spirit is in the greatest need of all.