Friday the 13th Part 2

Friday the 13th Partis a 1981 American slasher horror film directed by Steve Miner. It is a direct sequel to Friday the 13th, picking up five years after that films conclusion, where a new murderer stalks and begins murdering the camp counselors at a nearby training camp in Crystal Lake. The film marks the first time Jason Voorhees is the antagonist his mother was the killer in the previous film.

Two months after the Crystal Lake massacre, sole survivor Alice Hardy is recovering from her trauma. In her apartment, she finds the head of Pamela Voorhees in her refrigerator and is brutally murdered by an unseen Jason Voorhees with an ice pick.Five years later, Paul Holt hosts a campcounselor training camp at a building near Crystal Lake. Included among the counselor hopefuls are lovers Jeff and Sandra, troublemaker Scott, sporty Terry, wheelchairbound Mark, sweetnatured Vickie, jokester Ted, and Pauls assistant, Ginny. At the campfire that night, Paul tells them the legend of Jason Voorhees to scare the other counselors from entering Camp Crystal Lake. That night, local character Crazy Ralph wanders onto the property to warn the kids, but is garroted with barbed wire by Jason. The next day, Jeff and Sandra go to Camp Crystal Lake and find a recentlykilled animal that looks like Terrys dog, Muffin. They are discovered trespassing by the sheriff and returned to the camp. As he is leaving, the sheriff spots Jason on the road and chases him into the woods, coming across a rundown shack. As he investigates, he discovers a sight that horrifies him, moments before he is killed by a claw hammer. ........

Source: Wikipedia