A British man crashes his car in Beijing and upon his return, he's accused of murder. After an incident on board, the officer escorting him begins to suspect foul play.

As Nolan fears for his life, tensions rise on board; Hana is instructed to investigate by the head of MI5 Delaney; Hana's sister starts digging into the events occurring on NCA 357.

Jess fears for her life when she becomes a target for both MI5 and a deadly assassin; Delaney uncovers a shocking truth that changes her understanding of events that night.

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.