A British man gets caught up in an incident in Beijing and upon his return, he’s accused of foul play. Now he must go back to China to face his crimes.
As Nolan fears for his life, tensions rise on-board, and Hana is instructed to investigate by Head of MI5 Delaney.
Nolan recounts the events in Beijing, while Hana continues to investigate the events on-board. Meanwhile, Jess’s findings lead her to a mysterious company.
Jess fears for her life when she becomes a target, and Delaney uncovers a shocking truth that changes her understanding of events that night.
The truth about events on-board is revealed, forcing Hana to take drastic action, and Tennant is put in charge of Delaney’s operation, forcing Delaney to break protocol.
The events of the fateful night in Beijing are revealed as Hana and Delaney risk their lives to bring those responsible to justice.
As the murder of a diplomatic courier leads DS Hana Li to London's US Embassy, MI5's Madeline Delaney receives a call about a bomb on the jet she is travelling on.
As Hana and Brody search for the killer, the embassy is put into lockdown but Fox remains one step ahead of them - meanwhile, a bomb is found on Delaney's jet.
When a second embassy guest is murdered, it's discovered that both victims were part of a panel that blamed the crash of the D-300 on Russia.
Hana finds a clue which changes everything, Delaney and Peterson try to defuse the bomb onboard the jet, and Banks and Jess uncover vital evidence.
Hana and Brody set a trap to catch Fox, Jess enlists surprising medical help to save Ruth's life, and the true architect of the conspiracy is finally revealed.
The true nature of the conspiracy is revealed as Hana and Brody overcome their personal demons and work with Delaney to deliver justice.
