Watch anime online, stream anime episodes for free, you are watching One Piece Episode 457 English version online and free episodes. Anime Episode guide, Chapter One Piece Episode 457 English Subbed A Special Retrospective Before Marineford! The Vow of the Brotherhood! Luffy recalls his childhood wih Ace, meeting him again in Alabasta and receiving his Vivre card, meeting Blackbeard without knowing who he was, hearing the news about Ace’s execution, and confronting Blackbeard in Impel Down. Ace, awaiting his execution in Marineford, recalls his encounter with Blackbeard.