Detective Sergeant Jill Jackson is working undercover in Sydney's murky drug world. Living in a run-down apartment and making unlikely friends, Jill sees first hand what devastation the illegal drugs scene can wreak. Meanwhile Jill's sister Cassie has a new boyfriend, Christian Worthington. He is one of the beautiful people, rich and good looking with a great job doing pro bono work. But he is also Cassie's supplier, keeping her drawers filled with cocaine and crystal meth. When Cassie overdoses and is dumped at the hospital her life begins to spiral out of control. Now Jill must try to save her sister without blowing her cover and months of undercover work.