AllMovie

Suspenseful without emphasizing blood and gore, this crime drama stars Maribel Guardia as Eugenia (The Scorpion), a tough, single-minded detective who is determined to track down a deranged killer that is terrorizing the demimonde of Mexico City. The schizoid murderer is Don Eliseo Mendieta (Carlos Ancira), an antique dealer by day, and a brutal killer at night. His religion-inspired madness drives him to kill each of the people in a porn film in exactly the same way, including his wife. "The Scorpion" travels through the shady, crime-ridden neighborhoods of the city looking for leads that will help her capture the murderer.