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. Hana and Delaney hatch a daring plan, risking their lives to bring those responsible for the conspiracy to justice.