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

After the loss of his brother Ace, Monkey D. Luffy isolates himself on the dangerous island of Rusukaina for two years to train. His goal is to master Haki, a powerful energy that enhances combat abilities, while battling creatures on the island. During his training, Luffy’s peaceful time is disrupted when Boa Hancock’s sisters, Sandersonia and Marigold, are kidnapped by a notorious pirate. Luffy uses his growing Haki powers to track down and defeat this new threat. As Luffy faces this enemy, he also confronts his grief over Ace’s death, which fuels his determination. With Boa's help, Luffy sets out on a mission of rescue, preparing for future battles on the Grand Line.