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.

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 truth about events on board is revealed, forcing Hana to take drastic action; Tennant is put in charge of Delaney's operation, forcing Delaney to break protocol.