In UNBOY, video games are real. Some time ago, a legendary gamer scattered numerous cards imbued with special gaming powers across the globe. Today, players compete with one another in no-holds-barred duels to collect them all. For whoever collects the entire deck will have their greatest wish granted. Chan, a good-natured 13 year-old boy, dreams of challenging the strongest gamers in the world. During a duel with Jin, a ruthless player with a dark past, a new challenger approaches. Now Chan and Jin must work together, or it's game over for both of them!