When his best mate and partner is killed in a random attack, Detective Gary Hyde and his new partner Claire McKenzie discover an underbelly of murder and fraud that threatens national security.
Gary and Claire track a suspected terrorist to Far North Queensland and intercept a smuggler with a deadly cargo. Meanwhile, Tanya and Kevin uncover a money laundering operation with a difference.
Gary and Claire are caught in the crossfire when an outspoken radio host is shot by an extremist. Sonya defends the rights of her star pupil, who is a terrorism suspect in Gary's investigation.
Gary's marriage is tested when he travels to Indonesia with Claire to investigate a terrorist suspect. Tanya and Kevin suspect there is a mole within the Task Force.
A deadly Mosque bombing proves Claire's suspicions of a traitor inside the Task Force. Gary and Sonya's marriage faces a crisis when their son Oscar has a health scare.
Gary and Claire take the law into their own hands to find the terrorists threatening national security. A power struggle within ASIO threatens to derail the Task Force's investigation.
