In the aftermath of the school shooting, the squad copes with the trauma as it affects them in ways they never expected.

The squad becomes involved in a feud with firemen; little mistakes cause consequences.

The identity of the mole is revealed.

The squad waits for findings from a task force into Sergeant Houle’s case. Nick and Ben find themselves at the centre of the fractured squad, the only partnership that has endured. On the job, the squad face a horrific accident that puts multiple lives in danger.