In their second joint case, detectives Lisa Kuen and Alexander "Alex" Yüsüf-Demir from the Innsbruck criminal police investigate a murder near a small Tyrolean town, where a dead man is found in the Wolfsschlucht, the victim was shot.
Following an act of violence, two loving sisters plan to take revenge on the unconvicted perpetrator and find themselves being pulled deeper and deeper into the darkest areas of their minds. As they are constantly confronted with their fears, they must figure out if the decision to take the law into their own hands can be the answer to their pain.