Flashbacks

Sun is at a party. Jin, a waiter, passes Sun a note telling her to meet him in private. Sun wants to run away with Jin to America, but he insists they honorably tell her father that they are seeing each other. Jin returns from talking to Sun's father, who approves of their relationship as long as Jin takes a job working for him. One night after they're married, Jin returns home covered in someone else's blood. Sun is angry that he refuses to speak of it to her and slaps him. He tells Sun that he does whatever her father tells him to do. A few years later, Sun secretly plots to leave Jin and her father, so she will be free to go wherever she wants. However, she does not go through with her plans as he expresses a loving gesture to her, and boards the doomed flight with her husband.

On the Island

Jack, Kate Austen (Evangeline Lilly), Charlie Pace (Dominic Monaghan) and John Locke (Terry O'Quinn) go to the caves to gather water and investigate.

Sun is shocked to see Jin attack Michael on the beach for no apparent reason. Sawyer and Sayid manage to subdue and handcuff Jin to the wreckage. Michael says the attack was racially motivated, which he later tells Walt Lloyd (Malcolm David Kelley) is not true. At the caves they discover two bodies, whom Locke dubs "Adam and Eve". From the deterioration of their clothes Jack estimates that they have been dead for 40–50 years, and finds a pouch on them containing two stones: one black, the other white.

At the beach, Jin tells Sun that Michael has her father's watch. Locke and Charlie are clearing the wreckage at the caves and Locke tells Charlie he recognizes him from DriveSHAFT. Charlie is relieved that finally someone, other than Kate, is familiar with his musical background.

Jack and Kate return to the beach and Jack starts talking to people about moving to the caves. The castaways argue whether to stay on the beach where a rescue party could see them (and keep the signal fire burning), or move to the caves, where there is more shelter and fresh water. The group splits into two camps accordingly: Jack, Locke, Charlie, Hurley, Jin, and Sun move to the caves while Kate, Sawyer, Sayid, Michael, Walt, Shannon, and Boone remain on the beach.

Sun finds Michael alone, and in perfect, unbroken English says, "I need to talk to you." Michael is shocked that she speaks English. Sun tells him that Jin is unaware of this. She explains that Jin angrily attacked Michael because of the watch he's wearing, which belongs to her father. Michael says he just found it in the wreckage and it's nothing important.

At the caves, Locke tells Charlie that he knows Charlie is addicted to heroin. Locke says if Charlie gives up his drugs, the island will give him his guitar, which he misses deeply. Charlie hands over the heroin, Locke shows him where the guitar is, and Charlie is ecstatic. On the beach, Kate refuses to go with Jack to the caves. Michael menacingly approaches Jin with an axe, throws the watch at him, and shouts that the fight over the watch "is ridiculous, because time doesn't matter on a damn island." Ironic considering the great importance that time and time travel will ultimately have on this story. As Michael cuts Jin free of his handcuffs, one of the cuffs remains on his wrist, and Michael tells Jin to stay away from him and Walt.

That night at the caves, Charlie plays his guitar as Jack returns with people from the beach.