In the third episode of Legends, the story unfolds in Liverpool, where Eddie's son, Tommy, returns from the military. He ventures to a club where he hooks up with a woman who takes him to her apartment. There, the two indulge in drugs, and Tommy gradually finds himself slipping into addiction. Instead of returning to the military, Tommy's life spirals out of control.
Meanwhile, Angus learns about the partnership between the Liverpool gang and the Turks. Guy reveals that he will act as the transporter for the Turks, helping them smuggle large quantities of drugs into the country. Kate adds that this will also aid them in understanding how the Liverpool gang operates. Angus expresses his concerns about things potentially going awry.
Don instructs the team to keep both operations separate despite the rival gangs' alliance. Erin speaks with Kate about Eddie and Carter's past, revealing that Carter faced several criminal charges that were all dropped before reaching court.
Concurrently, Carter and Aziz discuss the terms of their partnership. Hakan reveals that they will be testing Carter's loyalty. Aziz asks Guy to arrange for the drugs to be brought into the country and dropped off at a public bridge in Birmingham. Guy questions why he should drop the drugs there instead of taking them all the way to Liverpool.
Later that day, Guy approaches Don and requests permission to let the drug package pass through customs. However, Don is hesitant and refuses to let the shipment pass through the customs office, asking Guy to find an alternative method.
That night, Bailey and Kate sneak into the building after Carter and his men leave. Kate captures photos of the drugs while Bailey places a voice recorder inside. As they prepare to leave, they realize that the exit code is different from the entry code, trapping them inside.
Kate urgently calls upon Shaun for help, pleading with him to rescue them from their predicament. Shaun valiantly attempts to unlock the building from the outside, but realizes that repeated triggers have locked the system. Kate and Bailey are consumed by panic, but Kate ingeniously suggests that Shaun enlist the help of a power worker to cut the fuse, allowing them to break free from the building's confinement. Shaun complies, and they manage to escape. However, as soon as the power is restored, the lock begins buzzing once more. Bailey urgently requests the power worker to shut off the lights once more and depart.
On the other hand, Guy returns home to Sophie, troubled by the call from the Turks. He offers to halt work on the operation, but their conversation is abruptly interrupted when Don unexpectedly appears. Don reassures Sophie that she has nothing to fear from the Turks, as they do not possess her address or phone number. Impressed by Sophie's previous work at the Customs office, Don enquires whether she would be interested in working for him. That night, Guy confides in Don about his two younger brothers who passed away when he was a child. He candidly shares the hardships he faced as a child and tells Don that he is genuinely content working on the project.
The next morning, Sophie assures Guy that she will gladly lend a hand if he ever requires her assistance with the mission. Meanwhile, Eddie arrives at the building and discovers Bailey there, pretending to work for the power company. Bailey attempts to deceive Eddie about faulty wires causing the lock malfunction, but Eddie remains suspicious while Kate and Shaun feel relieved.
At the Felixstowe Docks, Zeki and his teammate Taner arrive at Guy's transport store to pick up the drugs. Zeki insults Guy by referring to him as an outsider. Guy then notices a group of customs officers arriving to inspect the imported goods. He swiftly signals Don, who is waiting nearby as backup.
Don rushes to the head of the customs office and demands Angus to halt the inspection, enabling Guy to prepare for the drug drop to the Liverpool gang in Birmingham. Simultaneously, Erin provides Kate with the address of Carter's apartment, and Kate embarks on her own investigation.
Meanwhile, Tommy calls Eddie and requests a meeting, confessing his drug addiction and pleading with his father to take him to rehab. Eddie agrees to drop Tommy off the following day and leaves him some cash for food.
Guy and Taner arrive at the designated spot in Birmingham to hand over the drugs to Carter and Eddie. However, the police suddenly appear, and Guy manages to escape. Taner is forced to abandon the drugs without completing the delivery. The police officer later calls Don and confirms that everything is going according to plan.
It turns out that Guy was the one who requested Don to call the cops to ensure the failure of the drug trade. Guy later meets with Hakan and blames Zeki for the entire situation. Hakan tells Zeki to stop interfering and insists that Guy is crucial to their business. Guy then asks Hakan for more autonomy in managing the transport operation.
Hakan calls Carter and orders him to eliminate a traitor within his gang. During a conversation with Shaun, Jed notices inconsistencies in Shaun's story and alerts Carter. Carter asks his cop friend to run a background check on Shaun and eventually learns that Shaun works for the customs office.
Meanwhile, Eddie receives a call from his family informing him of Tommy's death due to a drug overdose. He rushes home to be with his family but is soon called back to work by Carter, who orders him to kill Shaun.
However, Kate and Bailey overhear the conversation through the transmitter and manage to save Shaun and his family just in time. Eddie and his men arrive at Shaun's house and set it on fire as the episode concludes.
