redsfictionrecs
"Hey, Sid, your half sister... she's moving in with you guys, right?"
"Yes, and be nice to her. She's been through a lot, and she's still not completely better."
In which the Yellowjackets crashed in 1993 with a lot of them as Freshman in high-school, got rescued in 1995, and one of the survivors ends up moving in with her biological mother's family, the Prescotts, thinking the change will be good for her. That same night in 1996, the Ghostface killings start.