The Possession of Hannah Grace (also known in some countries as Cadaver) is a 2018 American supernatural horror thriller film directed by Diederik van Rooijen and written by Brian Sieve.

It stars Shay Mitchell, Kirby Johnson, Stana Katic, Grey Damon and Nick Thune, and follows a former policewoman who encounters the supernatural while working in a morgue.

It was released under the Screen Gems label and received generally negative reviews from critics, but grossed $43 million worldwide.

Three months later, Megan Reed, an ex-cop with the Boston Police Department struggles with depression and an addiction to pills after her patrol partner was shot dead by a criminal whom she failed to subdue.

During Megan's second shift, a man (later identified as Grainger) aggressively tries to convince her to let him into the building, but she denies him and informs the two security guards Ernie Gainor and Dave.

However, shortly after, Megan helps EMT Randy to move the corpse of a brutally murdered young woman (later identified as the one of Hannah Grace) into the building and the man secretly enters.

Randy tells Megan a man stabbed Hannah to death and was then caught in the act trying to burn her body in an alleyway.

Meanwhile, Hannah kills Dave by telekinetically lifting him across the ceiling and into her refrigerated drawer in the morgue where she breaks his body.

Suddenly, Andrew calls Megan to warn her that Grainger has escaped police custody after killing the two officers transporting him.

On March 23, 2016, it was announced that Screen Gems hired Diederik van Rooijen to direct horror thriller Cadaver from a script by Brian Sieve, which Todd Garner and Sean Robins would produce through Broken Road Productions.

Due to it being a "low-budget cash grab in the current slow marketplace," anything over $5.5 million would have been considered a success by Sony.

The website's critical consensus reads, "The Possession of Hannah Grace feints at real horror just often enough to offer hints of the movie it should have been -- and further frustrate viewers seeking a good scare.

"[14] On Metacritic, the film has a weighted average score of 37 out of 100, based on 10 critics, indicating "generally unfavorable reviews".