One Piece 3D2Y: Overcoming Ace's Death! Luffy's Pledge to His Friends

In the aftermath of the Marineford war and a devastating personal loss, Monkey D. Luffy washes up on Rusukaina—an unforgiving island packed with massive, lethal beasts. Determined to grow stronger, he dedicates himself to two years of intense training to master Haki, a mysterious power that can reshape the flow of battle.

That hard-won routine is shattered when Sandersonia and Marigold, the sisters of his ally Boa Hancock, are kidnapped. Teaming up with Boa, Luffy sets out to pursue the notorious pirate behind the abduction—an escaped prisoner whose freedom traces back to Luffy’s own impulsive choices. As he closes in, Luffy is forced to rely on his still-developing Haki while confronting the grief he’s been carrying.