The third installment in the "Friday the 13th" series picks up on the day after the carnage with homicidal maniac Jason Voorhees (Richard Brooker) stealing some clothes and killing a local store owner. Meanwhile, Chris (Dana Kimmell) and her sometimes boyfriend, Rick (Paul Kratka), are hosting a group of teenage friends at Chris' lake house. Despite a run-in with a local biker gang, they enjoy an amiable weekend together -- that is, until Jason begins knocking off kids and bikers alike.