Monkey D. Luffy, an optimistic young pirate with dreams of finding the One Piece, sets off in search of the loyal crew he needs to navigate the vast oceans. His journey begins when he helps Koby, a deckhand forced into servitude, escape an undesirable situation. While in Shells Town, Luffy meets Roronoa Zoro, a famed pirate hunter, and Nami, a Master thief, and the three form a tenuous alliance.

Luffy, Zoro, and Nami find themselves imprisoned on an island overtaken by the deranged clown pirate, Buggy. Koby joins the Marines and proves his mettle.

Luffy, Zoro, and Nami land in Syrup Village, where they meet Usopp, a local who introduced the group to Kaya, a sickly shipyard heiress under the care of trio of overbearing house staff. With the help of Koby, Vice Admiral Garp, a powerful marine, sets off in search of Luffy.

Luffy, Zoro, and Nami fight their way through Kaya's mansion, which has now become a prison. Usopp enlists the help of Koby, Helmeppo, and the Marines. Luffy finally gets the ship of his dreams as Garp closes in.

Luffy and the gang are tested in their ability to fight together on the high seas. They arrive at Baratie, a floating restaurant, where they encounter Sanji, a young chef with a love of fine dining. A duel on the docks shocks the group.

The group is ambushed by a threat no one sees coming. After a hard-fought battle at the Baratie, Sanji finally follows his dreams while another crew member shows their true colors.

After striking a deal with a familiar foe to find Arlong, Luffy and his friends set sail for Coco Village and learn about Nami's mysterious past.

The Straw Hat crew strives to take down Arlong and the Fishmen once and for all. After a tense family reunion, Luffy inches closer to his dreams.