A borrowed hat, an impossible promise, and the first person willing to follow.
Luffy’s adventure begins with an argument about what strength looks like. In Foosha Village, Shanks laughs off a bandit’s insult, then risks his life when that bandit threatens a child. Luffy initially mistakes restraint for cowardice. The rescue, and the arm Shanks loses while making it, turn an abstract fascination with pirates into a personal promise. Luffy will become a great pirate and return the straw hat entrusted to him.
Ten years later, he sets out with a rubber body, very little preparation, and absolute confidence in his destination. The first recruits and rivals do not gather because he presents a convincing plan. They respond to his willingness to say what he wants and act against the people controlling their lives. Coby wants the Marines; Zoro wants the summit of swordsmanship. Luffy treats both ambitions as real before either man is in a position to pursue them.
Story
The promise at the shoreline Ch. 1
Foosha Village is a quiet harbor that has grown used to the Red Hair Pirates drinking in Makino’s bar. Seven-year-old Luffy wants to sail with them so badly that he drives a knife under his own eye to prove his nerve. Shanks refuses him anyway, and Luffy, sulking at the counter, eats a strange fruit from a chest without knowing what it is. His body turns to rubber, and the sea is closed to him forever.
When the mountain bandit Higuma pours drink over Shanks and mocks him, the captain laughs and cleans up the mess. Luffy is furious at what he reads as cowardice. He picks his own fight with Higuma days later and is dragged to the shore to be drowned. Shanks arrives with his crew, disperses the bandits without raising his voice, and swims after the boy when a sea king takes Higuma. The sea king takes his arm as well.
Shanks tells Luffy that an arm is a small price for a friend. When the crew finally leaves, he sets his straw hat on the boy’s head and asks for it back once Luffy has become a great pirate. The gift is not a coronation. It is a debt Luffy chooses to carry, and the promise gives shape to everything he does afterward.
A boat too small for the sea Ch. 1–2
Ten years pass. Luffy, now seventeen, rows out of Foosha Village in a dinghy with a barrel of supplies and no map, while the villagers watch from the harbor. The Lord of the Coast, the sea king that took Shanks’s arm, surfaces to swallow him. Luffy knocks it back with a single stretched punch, a small demonstration that his body has become something the sea must reckon with.
His voyage lasts barely a day before a whirlpool swallows the boat. He survives by climbing into the barrel and letting the current carry him, which is how he arrives, asleep and packaged, on the deck of Alvida’s ship as her crew hauls the barrel aboard for what they assume is wine.
Coby chooses his own course Ch. 2
Coby has spent two years scrubbing Alvida’s decks after boarding the wrong boat, and terror has reduced his life to a set of obedient answers. He tells Luffy that he once dreamed of joining the Marines, then apologizes for saying so. Luffy does not offer comfort. He tells Coby plainly that dying for a dream is better than living without one and lets the boy hear his own excuses out loud.
Alvida demands to know who the most beautiful woman on the sea is, the answer her crew recites daily. Coby, shaking, tells her the truth. Luffy flattens her with one punch and takes a lifeboat, with Coby beside him. The friendship begins on the understanding that Coby will one day wear the uniform that hunts Luffy, and neither of them treats that as a problem.
A swordsman in the Marine yard Ch. 3–5
At Shells Town, Roronoa Zoro has been tied to a post in the Marine base yard for three weeks. The town speaks of him as a monster, but the girl Rika tells another story: he cut down Helmeppo’s pet wolf to protect her, and accepted a month of punishment in return for the town’s safety. Helmeppo, son of Captain Morgan, has no intention of honoring the bargain. Luffy hears him say so.
Luffy decides on the spot that Zoro will be his swordsman, though Zoro has not agreed. He climbs into the base to retrieve Zoro’s confiscated swords and finds three where he expected one. Coby, meanwhile, cuts Zoro’s ropes and is shot for it. Morgan’s Marines surround the yard as Luffy drops from the roof, swords in hand, and offers Zoro a choice between execution and joining a pirate.
Two thousand and one duels Ch. 5
Zoro remembers the dojo where he trained as a child and the girl who beat him every time they crossed swords. Kuina, the master’s daughter, defeated him in two thousand matches with bamboo and then once more with real blades. Afterward she wept, because her father had told her that a girl could never become the world’s greatest swordsman, and she had begun to believe him.
Zoro told her that her sex was no excuse for beating him, and the two promised that one of them would one day hold the title. The next morning Kuina fell on a staircase and died. Zoro asked for her sword, Wado Ichimonji, and carries it still. The dream he refuses to surrender in Morgan’s yard is hers as much as his.
A punch for a friend Ch. 7
With Morgan beaten, the Marines of Shells Town throw their caps in the air. Their relief does not extend to hospitality: they feed Luffy and Zoro at Rika’s family restaurant, then order the pirates off the island. Coby stands frozen when the officers ask whether he arrived with the outlaws, knowing the truth would end his career before it begins.
Luffy solves the problem by mocking Coby’s past and punching him in front of everyone, giving the Marines a reason to declare that the two cannot be friends. Coby is permitted to enlist. As Luffy and Zoro row away, he salutes them from the dock, and the whole base salutes with him. Luffy has his first crewmate and his first ally on the other side.