After things go too far and Shelby ends up seriously injuring herself she befriends River, a boy at her school who's also been bullied. As their friendship deepens, Shelby finds she has no further need for Bestie and her toxic friendship, but Bestie won't be deterred and finds a way to get revenge. When River invites Shelby to a creepy abandoned house on a date, she realizes too late that it's where Bestie lives, and when she finally appears, it becomes clear that she's been manipulating River as well, and he murders Shelby to remain"best friends forever" with Bestie in this killer opener for American Horror Stories season 3.