True-crime writer John Silvester investigates a silent war happening in Australia concerning police officers' license to kill. Lives are changed forever when a split second and a loaded gun lead to deadly consequences.

Changes in police operational training dramatically reduce the number of shootings. John examines a controversial incident.

Lana struggles to cope with the dangers of her job, but finds support in her budding relationship with Karl. After a terror group claims responsibility for the mosque attack?, the bombing campaign intensifies with an attack on an LGBT target.

Lana works with New Scotland Yard to hunt The Crusaders before they carry out another terror attack, and she is confronted by the horrifying possibility that someone close to her could be involved in the bombing campaign.

Lana battles her inner demons as she blames herself for the devastating loss. When the Counter-Terrorism team identify the bomber, Lana is determined to track him down.

A desperate manhunt for the mastermind behind the bombing campaign plunges Lana Washington's EXPO team into ultimate danger.