Ace returns home in Kalgoorlie as the first ever Aboriginal Custody Officer in the city; Leroy's limits are tested on an exceptionally tough day of training; Patricia heads over to a neighbouring island to investigate an attempted ATM break-in.

Leroy gets a wake-up call about his performance on realistic scenario training day; Sgt Kickett works to contain an escalating juvenile crime spree before it leads to tragedy; Ace uses compassion to calm down a violent detainee.

Sgt Kickett struggles with the reality of sending juvenile offenders to detention in Western Australia; Leroy faces his first mock court case at training; Patricia helps to reform the Queensland Police's cultural awareness training.