DS Hunter has just come back from an injury he sustained whilst trying to help DI Nixon. A woman is robbed of her winnings on the way home from a casino, and suspicion soon falls on the barman who called her a taxi – which was driven by his friend. The case against the men grows stronger when it turns out they once before arranged transport for a woman who was attacked, so Emma is sent undercover as a casino punter – only for events to take a surprising turn. Callum and Dan are called to a domestic disturbance, and uncover infidelity and drug use.