The series is based on the horror film "Friday the 13th." It tells the story of events that occurred before the brutal massacre at Crystal Lake in the first film of the 1980 series. According to the plot of the first installment of "Friday the 13th," an unknown person hunted down the camp counselors. In the final twist, it was revealed that Pamela Voorhees was behind the crimes. In the subsequent parts, her resurrected son, the hockey-masked killer Jason Voorhees, took on the role of the villain. The series will reveal more details about Pamela and her son's backstory.