When a man shot dead on Australia Day marks 19 shooting deaths in the past 15 months, the attorney general asks Janet to head a royal commission into gun crime. Before she begins work on the commission, Janet finishes up an inquest into the suicide of an army corporal suffering from PTSD.

After discovering the gun used in the drive-by was used in Ash's killing and the kneecapping of gambling addict Felix Murphy, the Commission launches an undercover operation to find out who shot Felix.