The whole thing goes horribly wrong, leaving the young woman dead, and it’s how she winds up crossing paths with Megan Reed (Shay Mitchell).
Hannah’s body is delivered to a morgue the first night that Megan is working the graveyard shift as an attendant, and it becomes very clear very quickly that while Hannah’s body might be seriously disfigured and not breathing, that doesn’t mean that she’s not insanely dangerous.
In the Diederik Van Rooijen-directed film, Kirby Johnson plays the titular Hannah Grace, who we meet at the start of the film at the center of an exorcism.