When John Welsh, an ex-SAS soldier robs a petrol station, TR join with a major crime squad to help bring him down.

A drug-related story Jacinta is investigating ends up putting her life at risk. Lawson tries to protect her, but finds she is quite unwilling to accept his help.

As TR, along with the drug squad, work to catch a well known drug gang, Kerry's efforts to save Blake, a meth cook and reformed drug addict becomes personal when, devastatingly, she finds out that her son James is battling his own addiction. Meanwhile, Josh finds himself fighting for his life when an unknown man breaks into his apartment and tries to kill him.