A bungled child sex slave case forces Police and Customs to work together.

While Parkes tries to make his mark on the Roughies team, Danny is enlisted by an old friend to find the truth about the disposal of hazardous materials.

Jane is on the verge of quitting the Roughies which leads to an authority clash when guns and ammunitions are found on board a visiting yacht.

With Jane threatening to resign from the Roughies and return to Customs, the team is caught up in a sting involving a terrorist ship in Auckland Harbour.

With the city under siege from terrorist threats, the Roughies are on a countdown to unravel a complex plan to reduce the CBD to rubble.

Chloe goes undercover against Dannys better judgment. But her plans backfire badly when personal issues cloud her judgment.