Kate and Rick arrange a series of sting operations to catch a corrupt builder; Jim's loyalty is tested when he is forced to investigate a mate over an alleged robbery.

Tensions are running high as Kate and Matt look into the case of a cheating spouse. Rick manages to expose an insurance scam involving broken ankles, theft and misguided love. Jim discovers a tragic family secret as he investigates a house fire.

Matt is hired to investigate doping in the greyhound racing industry. Rick and Kate risk losing their reputations and their biggest client when they are accused of wrecking a school formal. Jim's focus on the family business takes its toll on Claire and Lily's relationship with Marcus taking a surprising turn.