Byl's past simply won't let go of him, becoming a bigger threat than ever. The serial killer seemingly has a jealous obsession with one of his team members.
The past begins to move among the team like a toxic ghost. The serial killer's obsession reaches breaking point and she leads one of the team members into a trap.
Byl must act swiftly before his whole team is destroyed. The end of the season is driven to a climax when the team can only depend on each other to survive.