Years ago, the fearsome pirate king Gol D. Roger was executed, leaving a huge pile of treasure and the famous “One Piece” behind. Whoever claims the “One Piece” will be named the new pirate king. Monkey D. Luffy, a boy who consumed one of the “Devil’s Fruits”, has it in his head that he’ll follow in the footsteps of his idol, the pirate Shanks, and find the One Piece. It helps, of course, that his body has the properties of rubber and he’s surrounded by a bevy of skilled fighters and thieves to help him along the way. Monkey D. Luffy brings a bunch of his crew followed by, Roronoa Zoro, Nami, Usopp, Sanji, Tony-Tony Chopper, Nico Robin, Franky, and Brook. They will do anything to get the One Piece and become King of the Pirates!
Zephyr, now known as Z, rides the seas with only one goal: Destroy all pirates and their dreams at becoming King of Pirates. When Luffy and his crew encounter him at sea, not only are they utterly defeated by the man with an arm made of Seastone, Nami, Robin, and Chopper are turned 10 years younger due to Z’s minion Ain. Luffy is so determined to win against him that he does not even notice Z’s master plan that could sacrifice thousands of lives.
Guts, an immensely strong sword-for-hire, has little direction in his life, simply fighting one battle after the next. However, this all changes suddenly when he meets and is bested by Griffith, a beautiful and charismatic young man who leads the Band of the Hawk mercenary army. After Guts joins the Band and the relationship between the two men begins to blossom, Casca, the tough, lone swordswoman in the Band of the Hawk, struggles to accept Guts and the influence he has on the world around her. While the two men begin to fight together, Griffith continues to rise to power, all seemingly in order to reach his mysterious, prophesied goals. What lengths will Guts and Griffith go to in order to reach these goals, and where will fate take the two men?
A year has passed since Guts parted ways with the Band of the Hawks. Meanwhile, his former mercenary group is plotting a rescue mission to save an imprisoned Griffith.