Inspector Jaime Peña investigates an accident that has left the morgue's night watchman Ángel Torres in a
coma. Security footage reveals Ángel fleeing from his post before being struck by a car. Peña learns that the body of a woman, Mayka Villaverde, is missing. Mayka, a wealthy middle-aged businesswoman, was married to Álex Ulloa, a younger man, and suffered a heart attack following a business trip. Álex hears the news while with his mistress, Carla Miller, and assures her that Mayka is dead. At the morgue, Álex tells the
coroner about Mayka's medical history. Peña is convinced someone stole the body to avoid an autopsy and is suspicious of Álex, who Peña feels too easily speaks of his wife in the past tense. Peña, conversely, still speaks of his wife Ruth, who died 10 years ago in a car accident, in the present tense. Álex hears a loud noise and discovers a busted locker containing a bottle labeled TH–16. It is revealed he put the contents of the exact bottle into Mayka's wine earlier in the day. Peña informs Álex that Mayka's cell phone is missing. Caught with the bottle, Álex admits it is a
toxin manufactured by Mayka's pharmaceutical company, but denies knowing what it does. More strange events occur at the morgue that seems to target Álex and Carla, convincing Álex that Mayka is still alive and seeking revenge for his
affair and murder plot. Álex discovers Mayka hired a
private investigator, as she suspected his affair, and had also heard him plotting death. Álex started confessing to Peña. He admits lacing her wine with TH–16, which causes a heart attack after eight hours and leaves no trace in the blood. He is convinced Mayka did not drink the wine and faked her death with a tranquilizer. The police discover incriminating evidence at Álex and Mayka's house, including a map of the morgue. Ángel wakes up from his coma and reveals that after hearing a noise, he saw Mayka's body in the elevator before a figure in a
balaclava fired a gun at him, sending him running into the street. Álex insists Mayka is alive and has the means to disappear and that Carla is in danger. Peña informs him they have no evidence Carla Miller exists and that the address he gave for Carla's apartment has been empty for years. While transporting Álex, the police discover a body in the woods, which turns out to be Mayka's. Álex flees into the woods and collapses, as Peña closes in on him. Peña tells Álex his wife could have been saved if the other driver, who caused the collision, had called for help instead of fleeing. Peña recalls him and his daughter Eva watching helplessly as Ruth died. Following clues that Eva recalls, Peña learned it was Álex and Mayka who had fled the scene and left Ruth to die. Peña then shows Álex a photo of his daughter Eva: Carla Miller. It was Peña and Eva who had taken Mayka's body and conspired to frame him. Eva initially wasn't convinced of their guilt until Álex himself confided to her that he caused the hit-and-run. Álex, now gasping to breathe, learns that eight hours earlier, Eva had dosed him with TH–16, and his death will be explained as a
heart attack brought on by stress. == Cast ==