It completely tells the story of Ace. It shows how Ace acquired his devil fruit ability and also introduces the Spade Pirates and the first member of the crew to join which is Masked Deuce who actually just appeared in episode 1013 of the anime. The story is great. The art style is obviously as good as the One Piece manga. It's full of the usual witty humor and inspiring moments like all backstories of One Piece are. It completely shows the beginning and end of the life of Fire Fist Ace...and his raging fire. If you like One Piece and love adventurous stories then you'lllove this backstory on one of the most popular characters in the One Piece universe.