Prison transport officer Amber's first day back after maternity sees her escorting ruthless contract killer Tibor Stone to court so he can testify in a high-profile case. When their convoy is attacked by a highly organised unit, Amber handcuffs herself to the prisoner to prevent his escape, but Tibor is a marked man and their assailants will stop at nothing to make sure he does not make it to court.

While being tracked down, Amber and Tibor turn the tables on Nina. Hitching a ride to London in the back of a lorry, they're unaware that their driver has sold them out.