Rules how to survive a slasher summer 1. DONT DRINK 2.DONT HAVE SEX 3.NEVER. EVER SAY "ILL BE RIGHT BACK" In which Harper Jenkins gets keys from her grandparents old cabin for her 17th birthday, so her and her friends decide to spend a week in the cabin during the summer. The idea of going to the cabin alone with her friends without any adult supervision sounded great. Until.