When the imprisoned serial killer Lasse Maasalo's face and a text "Let's make the world a better place" are painted to an underpass with blood, Kari Sorjonen is forced to confront the most difficult case of his career.
Un mural sangriento, una letal encuesta en redes sociales y un infame asesino en serie hacen que este sea el caso más difícil de la carrera del detective Kari Sorjonen.
