From Hell I Came: Hands Off My Bestie!

Zoe Lane dies in a car accident while saving her best friend, Olivia Reed. In the underworld, she discovers that Olivia is being mistreated by her wealthy husband. Enraged, she signs an underworld loan to return to life, but instead awakens in the body of the dying grandmother of Olivia’s husband. From then on, the frail elder unexpectedly recovers on multiple occasions, each time stepping in to support Olivia, who begins to find the old lady’s familiar fierceness chillingly