David Torres is waiting for his girlfriend Lauren, who should be returning home after a weekend away. Lauren is nowhere to be found, but her car is parked outside. When David decides to inspect the car, he discovers Lauren murdered in the trunk.

Dick Klein finds a mysterious letter from his deceased wife, hidden in a photo frame. The letter reveals that her death in a house fire was not an accident and is connected to a traffic accident two months earlier.

On April 24, 2014, Edward came home from a poker night and found his wife Stephanie's lifeless body in the kitchen. On July 4, 2015, Vivienne was found sitting on a park bench with a bullet shot in her neck. On November 24, 2016, Eva was found with her throat slit in a bus shelter. These three murders have never been solved.

At a police station, a box is left containing a notebook and polaroid photos of bound women. The notebook and photos reveal the work of a serial killer.