Detective Gary Hyde is on his way to his son's tenth birthday party when he and his best friend and fellow detective, Nick Petrides are called to a homicide. It's routine until the murder victim's van explodes, killing Nick instantly. Gary breaks the news to Nick's pregnant widow, Angela, and vows to find whoever is responsible. Gary draws strength from his wife, Sonya and soccer mad son, Oscar - a leukaemia survivor.

Gary rescues Jamil, the sole surviving student from the shootout, and interrogates him aggressively. Claire takes a more sympathetic approach and she and Gary suspect that Jamil is an innocent dupe. Jackie learns that the gunman killed a Special Ops cop and clashes with Gary when she demands time with the witness. Gary's superior officer, Stuart, forces Gary to take compassionate leave and Sonya is pleased he can spend with his family. But Gary is still driven to avenge his partner's death.

Task Force Troy is in operation. The vehicle that tried to run Gary down is under surveillance and Gary hopes it will lead them to Nick’s killer - known only as Malik. Instead a different suspect is revealed whom Claire identifies as being in possession of a dodgy NZ passport. Gary gives chase but Abbud kills himself. When Gary and Kevin search his place they find 500 k worth of gold bullion.

Gary is coaching Oscar's soccer team, but Oscar is frustrated by his father's over protectiveness. When a teenage gunman fires on a radio shock jock, Gary and Claire are drawn into the investigation. The victim, Mikey Jackson, survives but is in a serious condition. The gunman is identified as Basam Karim, the son of a prominent Muslim community leader. Omar is horrified by his son's actions but a search of his house reveals a cache of hidden weapons. There is no sign of Basam.

The day of the Asia Pacific Security Forum has arrived and our team is on high alert when Ali King is spotted on security cameras near the forum venue. Angela suffers a melt down and fears there's a bomb under her car. Gary talks her down but experiences flashbacks to Nick's death and Sonya is worried about his state of mind.

Gary believes he has got justice for Nick. Sonya is looking forward to having Gary at home on leave, but Gary is disturbed that Claire doesn't believe it's over. Claire is piqued to learn that Ali King had a packed suitcase and a ticket to Indonesia but Jackie refuses to let her go. Gary has flashbacks to the shooting of Ali King. He goes to see Claire who runs through her reasons for believing Ali wasn't in charge. When Gary tells Sonya he is going to Indonesia she is furious. They argue and Gary walks out.