While Vickers and Morgan are away from the office on an official home office jaunt, Parkes and Cole go undercover in a club in an attempt to gather information on the owner, suspected of dealing drugs. Parkes realises that their only hope is through the VIP lounge, but upon gaining entry, the pair stumble upon much more than a drugs outfit, and discover that the owner is the ringleader of a human trafficking gang. Parkes tries to rescue a foreign girl, for whom he's developed an interest and becomes involved in the debacle, leading to a stern warning from Robinson. Family man Cole struggles with the undercover lifestyle and comes head-to-head with his wife, who forces him to choose.