In a speech, Dr. Layton introduces the concept of A9913, a memory-enhancing drug created by Hallorann Pharmaceuticals.

Eighteen young adults, including Anna, and Den have been recruited to take part in the clinical trial.

She is shocked when the events begin to play out in the present and likens the experience to déjà vu.

Jerrems is told that co-researcher Dr. Rasmussen was found dead; he was the man at the start of the film.

During the night, Anna finds the bedroom door is locked, and watches as the girls inside cough and begin to die.

Curtis, a nurse who is in charge of monitoring the subjects, injects her with a sedative and Jerrems explains that she is experiencing a rare side effect.

Marcus, Kristen, and Den see Curtis die and escape the building, joined by Scratch.

The drug was revealed to have a cumulative effect, and Pascal began to stop experiencing time as linear.

He had a psychotic break and is now killing the participants in order to pressure Jerrems into committing suicide.

Anna gets outside by jumping off the roof into a snowbank and goes to the car, where she finds Scratch's and Kristen's frozen bodies.

Jerrems notices liquid on the floor; Layton drops his cigar and the room goes up in flames as Pascal walks away.