The covert crew penetrates a turf war between two feuding gangs, one of which is a new and highly dangerous pack that's trying to seize the heroin market. In other developments, Ty's cash-strapped sister is in need of $7000, which Ty and Melissa can't provide.

Carter surfaces as the prime suspect in an undercover officer's slaying. Meanwhile, Melissa pushes Ty to quit his dangerous undercover profession and start a family. And Jaimie's boyfriend lands a new job in San Francisco.