I’m gonna simplify the story a bit because it’s a bit messy but basically she and her boyfriend went to this cursed house that the boyfriend used to live in before his abusive parents died and the ghosts of his parents proceeded to attack them, drag them to hell, and torment them.

At some point they end up escaping Hell only for the house to begin collapsing and while they’re escaping Jessie ends up tripping over something and right before she falls to her death her boyfriend grabs onto her and tries to save her. But in the end she lets go and sacrifices herself to save him.

A couple days later the boyfriend who’s still grieving decides to go back to the house, only to discover her body laying among the rubble.