Friday The 13th

In 1957 a young boy named Jason Voorhees attends a summer camp by the name of Camp Crystal Lake. During his stay he ends up drowning in the lake near a boating dock while the other camping children mock and make fun of him. The counselors who were supposed to be watching the children were busy hooking up while this was happening. Years later a killer appears at the camp, or is it that someone has returned for revenge?