Angie's assignment is jeopardised with the unexpected arrival of her sister; and Mac is faced with a dilemma when she discovers that Danni's involved with an associate of an underworld heavy.

Hollister asks Mac for help to capture the elusive Marty Stockwell, a master bank robber. He fatally shot one of Hollister's men, and now he wants revenge. So, Church and Danni go undercover to try and bring him to justice.