Is this summer or not?

Cassie is 17 years old and has always wished she had a mother figure. Her mother died shortly after giving birth to little Cassie. Cassie always blames herself for her mothers death but her father, Ethan, assures Cassie its not her fault. One night Cassie and a 4 other friends, Nate, Jasmine, Caleb, and Jace go into the woods to explore an  abandoned camp. Camp Summer Walker. As they explore they find records of kid who went to the camp. "Angelina Santiago" Was inside of the camps last year record. That was Cassie's mom! Cassie hopes to find some past about her mother at the camp. But they are met with some sprite during there little adventure. They later discover tons of dried blood, skeletons and bodies everywhere. It's a fucking crime scene. There's a fresh body on the floor *BANG* they heard from what sounded like a body falling to the ground. Will thy survive? What happend? Who else is there? And most importantly, how did mom survive?