In 2015, a series of murders shakes Belo Horizonte, each victim with a unique signature, made by the killer himself, a script. Entitled "Rat Scene". Years after failing the case, detectives Mildred and Marius are pulled back into the investigation when one of their colleagues, Detective Phillip, disappears, and a script resurfaces in his house. The "Rat Scene", this time signed with the name "Mildred." Bringing the "Rat" closer than ever. The return threatens dangerous revelations in a game they have never stopped playing. Now they need to find out where Phillip is. How? By making the "Rat Scene" with the "Rat" himself.