Kate, Sayid, Juliet, and Jack trek back to the beach camp. As they stop for the night Jack explains to Kate the deal he made with Ben, saying that he kept his head down and did not ask questions. Though Jack is talking to her, Kate feels an emotional distance between them. Sayid questions Juliet but Jack returns and tells Sayid to leave her alone and that she is under his protection. Juliet confesses to Jack that she is nervous about joining the beach camp.
Flashback to Juliet arriving at a private airport. Richard Alpert and Ethan Rom are there to escort her the rest of the way, claiming it is because of security. Juliet says good-bye to her sister, Rachel, promising to be back before the baby is born. In the airport terminal, Ethan checks Juliet's vitals, telling her it is routine. Alpert pours sedative into a glass of orange juice and gives it to Juliet to drink, saying some people cannot take the trip's intensity and that it is easier if she is asleep during it. Juliet says she was fine with signing all the paperwork, not being able to talk with anyone for six months, and that no one had ever heard of Mittelos BioSience at which point Alpert interrupts and tells her she was fine with it because she knows the place they are taking her is special. Juliet has a gift, with which she is supposed to do something significant. Juliet drinks the orange juice and passes out. She wakes up strapped down in the sleeping compartment of a submarine. Ethan unstraps her, and she follows him through the submarine, up the ladder and sees the awe-inspiring sight of the island.
At the beach camp, Charlie hears Aaron crying and wakes up Claire. Claire says she is not feeling well, so Charlie offers to take care of Aaron. Sawyer sees Jack, Kate, and Sayid returning. Though happy about their return he expresses his displeasure at seeing Juliet. Hurley engages Juliet in casual conversation. Juliet guesses that Hurley was sent to keep an eye on her. He tells her the last Other who came over, Ethan, was killed and buried nearby.
Flashback to Juliet talking to Ben. She tells him she thinks the pregnancy complications to the females on the island happen at conception, but there is nothing she can do about it unless she takes a woman off the island; Ben promptly replies no. Juliet tells him she has done all she can and wants to go home since Rachel will give birth in three months. Ben says she will be dead by then because her cancer has returned. Juliet is horrified. Ben promises to cure Rachel's cancer if Juliet stays. Juliet wants to know how. Ben says Jacob will take care of it himself.
At the camp, Jack tells everyone that he trusts Juliet and that should be enough, to which Sayid reminds him it is not. Jack defends his time with the Others saying he was there looking for a way off the island. Then Claire collapses. Juliet takes Jack and Kate aside and tells them she knows what's wrong with Claire because she did it to her.
Flashback to Juliet in bed with Goodwin. There is a knock on the door and she is given x-rays. Juliet looks at them and knows they have a problem. She walks to Ben's house and tells him he has a tumor. She accuses him of lying about curing Rachel's cancer, saying he cannot cure her cancer if he cannot cure his own. Ben denies lying and says he does not understand why he has cancer. Juliet desperately wants to go home, but he refuses to let her go.
At the camp, Juliet explains that Claire's immune system has turned on her due to a latent reaction to medication in her bloodstream. The medication was designed to keep Claire alive during the late stages of her pregnancy. Juliet knows this because she designed it. She was brought to the island to find out why women couldn't have children there. The mother's body treats the pregnancy as a foreign invader and the immune system attacks; every pregnant woman on the island died as her immune system began to die. Claire was the first to survive but even though she did not conceive on the island, Claire developed the same symptoms. Juliet had developed the serum to reverse what was happening and Ethan was giving it to her. Without the serum, Claire is in a form of withdrawal. Ethan kept a stash of the serum close by.
Juliet goes out into the jungle and retrieves the serum (it is hidden under the tree with a strange sign on it). Sayid and Sawyer have followed, and they want answers. Juliet tells them there is not time. Realizing they are not going to budge, she stands up to them and says she finds it interesting that they are the camp's moral police, considering what Sayid did in Basra and how Sawyer shot a man in cold blood the day before he boarded the plane. She says the serum can save Claire's life. The last thing they would want is Claire's blood on their hands. She takes the serum back to the beach and gives it to Jack. He warns her that if anything happens to Claire, he will not be able to protect her any longer.
Flashback to Juliet and Ben as they watch flight 815 break apart above them. Ben then leads Juliet out to the Flame station. Mikhail is there, and Ben tells him he wants detailed files on every passenger. Then Mikhail brings up a live video feed. They see a close-up of a newspaper with the current date (Which, it shows the date to be "Wednesday September 22 2004" The date of the crash). The camera swings around and reveals Rachel in a park with her 2-year-old son. Ben tells Juliet that Rachel's cancer was cured, that it went into complete remission and shortly thereafter she gave birth to a boy named Julian.
At the camp, Claire wakes up. She is feeling and looking much better. Juliet is now on the path to being trusted.
Jack brings her supplies to set up her tent area and tells her eventually everyone will need answers. Juliet asks why Jack trusts her and does not ask for answers. He says because when the submarine exploded, he saw in her eyes that she wanted to get off this island more than anything. That makes her "one of us."
There is a flashback to Juliet and Ben discussing their plans. Juliet will handcuff herself to Kate and say she was gassed and left behind as well. If Kate questions that, Juliet will say it was the only way to earn Kate's trust. Ben tells Juliet that Claire's implant has been activated, and she will become symptomatic in forty-eight hours. By the time Juliet gets to the camp, she will have a "nice crisis to solve". Pryce is already on his way to hide the case in Ethan's old drop point. Ben tells her to tell Jack she can save Claire since Jack trusts her. He says he will see her in a week. Then he throws a gas mask on the table and leaves.
Back at camp, as Juliet looks around and sees Hurley and Sun talking, Charlie with Claire, and Jack smiling at her. She smiles back.
If she is an Other reject, though, it would make her death which I'm foreseeing all the more tragic.
