When a prison riot erupts into violence, Red ends up face to face with the ring leader, a man who once held him hostage and nearly drove him mad. Injured prisoners are moved to a crumbling, overstretched hospital. But a killer is amongst them, preying on their weaknesses. As the vicious murders spiral out of control, can Red and his team put aside their own emotional torment and find a method in his madness (thetvdb.com)