Before leaving, Sydney grabs a video surveillance hard drive behind a panel and they escape. In spite of Renee's hesitation, Sydney convinces her to accept the phone she is giving her so they can be in touch, while Syd goes to Marshall to help her gather intel from the hard drive they had stolen. They split ways.

Syd meets with her ob-gynecologist and gets her first ultrasound. Sydney sees her baby for the first time and gets emotional, especially after realising that she is on her own.

In the APO office, the team watches a video footage that included Ivan Curtis, the man who killed Vaughn. Jack further explains that Curtis was recorded dead three years ago, although this video is dated only three days back. Jack concludes that Curtis and Dean have access to high-level resources, especially after seeing that all the traces they have done on them led nowhere.

Later, Sydney calls Marshall to zoom in on a video footage of Curtis dialing a number in his phone. They later find out that Curtis was setting up a meeting with Heinrich Roemer, regarding a package that Curtis had ordered. Syd visits Sloane in his jail cell, and asks for Roemer's location since this arms dealer had worked with SD-6 in the past. When Sloane advises her to not act out of revenge, Sydney points out that what she is doing is for her safety and her baby's.

In Amsterdam, Dixon and Weiss meet with Roemer for a "business deal." With Sydney on video surveillance, Dixon starts planting cameras in the building on his way to the restroom. Suddenly, Sydney sees Curtis emerge from a car that just arrived in the facility.

Roemer leaves Weiss to meet with Curtis in another room. After showing Curtis that his order of Nuridium is at hand, Curtis shoots Roemer and heads to the door with the package. Hearing the gun shots, Weiss defends himself when the guard attacks him. Dixon runs to Weiss' aid, and Sydney leaves her post to get into Curtis' car. As soon as Curtis slides in the back seat, he realises that Syd is waiting for him, with a gun pointed at his face.

At a CIA safe house, Dixon and Sydney interrogate Curtis, who refused to give them any answers. In another room, the team consults with Marshall on the phone, who warns them that the Nuridium that Curtis already has in addition to the one they had recovered, can enable a massive explosion similar to Hiroshima's bombing - multiplied by 50. They conclude that Curtis needs to be let go, so he can lead them to the other cases of Nuridium. Sydney is reluctant.

Dixon goes back to Curtis, hands him a bottled water, and starts convincing him to reveal the location of the other canisters of Nuridium. Curtis, in exchange, drinks the water and asks for immunity from his illegal businesses as well as from the murder of Vaughn. When Curtis continues to insult Sydney, Sydney kicks him in the neck to where he flew out of the window and into the canal. Syd and Dixon watch him escape, with the tracking serum in his system.

As Jack meets with Thomas Grace, a new agent he is recruiting for APO, Sydney and Weiss wait for a signal from the tracking device they planted in Curtis. When Weiss confides in Sydney that he is considering a position in Washington, Sydney expresses her happiness and says that she will miss Weiss. When Weiss voices out his hesitation to leave due to the recent events in Sydney's life, she insists that he should go. Suddenly, the signal beeps in Sydney's laptop: Curtis is airborne, bound for North Korea.

Using a stealth plane, the APO team approaches Curtis' private jet and sends out a docking tube underneath. As they silently boarded the jet, Dixon and Weiss head to the passenger deck, while Sydney stayed in the storage area to attempt to dismantle the Nuridium bomb. While looking for a detonator, Sydney realises that the container is not a bomb when she finds a body underneath. Syd looks up to see Curtis pointing a gun at her. Syd counters by saying that if he shoots her, she will cut the Nuridium wires.

In the upper deck, shots were fired between Marcus, Weiss and Curtis' men. The pilot is shot in the process and the plane abruptly banks sideways. Curtis is knocked to the ground and Sydney gains the upperhand when she grabs the gun from the floor and points it at Curtis. As Dixon regains control of the jet, Sydney continues to ask Curtis more questions about Prophet Five and offers to protect him. Curtis says they can't, and terrified of the group he is working for, he pulls the cargo door release button and throws himself out the plane.

Back in the APO office, Jack tells the team that the Nuridium was not going to be utilised as an explosive -rather, it was going to be used to power an advanced cryogenic chamber. The body they found remains unidentified but is under analysis in the DSR. When everyone leaves the briefing room, Sydney reveals to Jack that she can't go on alone, and tells him of her ultrasound. Jack assures her, by saying "I'm here." Syd appreciates this deeply and invites her father to her next doctor's appointment.

A few minutes later, while Weiss and Sydney were saying their goodbyes, Dixon arrives and announces that the body had been stolen from the DSR. Sydney calls Renee Rienne and shares the information. Renee tells her she'll see what she can find out. As Renee crosses the room, she passes by an open container -with the missing body inside, alive.