Kate's past returns to haunt her when her daughter Emma goes missing; Matt and Chad go undercover to catch a cheating management consultant; Rick tracks down a key player in the property scam that upended his life and Chad's life takes a surprising turn when an old flame makes him a tempting offer.

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.