A bunch of horny teens get killed at a summer camp they're trying to re-open. You see, at some point in the past some kid drowned in the lake because a bunch of horny teens were behaving like a bunch of horny teens instead of doing their jobs as camp counsellors and that kid's mom wasn't very happy about that. She takes matters into her own hands.
But did her child actually die when they drowned in the lake? Who's killing the teens? If you haven't figured it out you didn't look at the image at the top of this synopsis nor have you paid any attention to any pop culture references pertaining to this particular slasher movie franchise.
I still don't understand why after 10 movies in the franchise they decided it needed to be re-booted. There's no hard continuity through out the series. The basic premise of the movies is pretty simplistic, its really a series that can just exist in a world of infinite sequels. Unless your plan is to focus on Mrs. Voorhees again. Jason's pretty much a modern legend now and there's no need to re-tell his origin story.
So if you're out there thinking of making a new movie about Jason Voorhees, just make it a sequel stop trying to retell his origin, the fans want more they don't want rethinking of what makes the hulking masked morality lesson tick.
But enough of my ranting.