While investigating a dangerous heroin dealer named Gina, Agent Brooks is shot by an unknown assailant and dies in Danny's arms. Unwilling to blow his cover-and convinced the shooting is related to the drug bust-Danny strikes out on his own to find the culprit. Meanwhile, Barbara, Celeste and Ruby host a birthday party for Chance and four of his friends, and havoc soon ensues in the Arno house as the party guests discover incriminating family secrets that threaten their cover.