Portgas D. Ace and Masked Deuce are stranded on the East Blue island of Sixis together. Masked Deuce thinks that Ace steals all the food, he later regrets his actions and the two become friends. A monstrous bird lives on the island and tries to devour Deuce, but Ace defeats it. During the fight, the bird spits a chest which is later revealed to contain the Mera Mera no Mi. Ace eats the fruit, and he work together with Deuce to build a ship to escape, forming the beginning of the Spade Pirates. On the Moby Dick, Whitebeard is reading a newspaper report about Ace rejecting his offer to join the Seven Warlords of the Sea.
Chapter 2 - The Devil's Child
The Spade Pirates meet Rayleigh at Sabaody Archipelago. They then move to Fish-Man Island where they have a fight with Hammond and other fish-men. Upon reaching the New World, Ace's first order is to find Shanks and meet with him. Deuce tries to talk him out of it, fearing Shanks' power, but Ace insists and they find the Red Hair Pirates in a cave on a Winter Island. Ace introduces himself, and Shanks and his crew quickly become friendly when he reveals his association with Luffy. Shanks appears to realize Ace's heritage. Some time later Ace decides to go after Whitebeard in one of the islands in his territory, unaware that Jinbe is following them. Ace and Jinbe fight for five days until both of them collapse from exhaustion, with the Spade Pirates being unable to intervene due to the battle being too high-level. Whitebeard then arrives at the island and attacks the Spade Pirates, Deuce tries to get Ace to escape with them but Ace refuses and creates a flame wall between himself and his crew, due to not wanting them to be harmed by the Emperor. Ace then fights Whitebeard and loses, the Spade Pirates are taken aboard the Moby Dick.
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In the manga, Deuce does not dig a grave for a skeleton before meeting Ace.
In the manga, Deuce and Ace find the wreckage of a large ship and use it as material.
Deuce does not discover the fact that Ace is Roger's son.
The manga adds an encounter with a monstrous bird that lives on the island. The bird tried to devour Deuce, but Ace defeated it. During the fight, the bird spat a chest which is later revealed to contain the Mera Mera no Mi. In the novel, Ace simply found the fruit somewhere on the island.
In the novel, Ace comes up with Deuce's pen name after Deuce threatens to use the name 'Ace'. In the manga, Deuce chooses the name himself after agreeing to join Ace.
The manga ends with the prologue to the second volume of the novel.