Brad Anderson’s Session 9 (2001) is a chilling psychological horror set in an abandoned asylum where an asbestos cleanup crew begins to unravel under paranoia and dread. Haunted by the building’s dark past and their own secrets, the men descend into madness as sinister recordings reveal a fractured mind. A cult favorite for fans of atmospheric, slow-burn horror.

Desperate to win the contract to clean up the abandoned Danvers State Mental Hospital, the boss of an asbestos removal company promises a fast completion. The crew have their own personal history and tensions run high, but the derelict building has its own past and they are about to uncover the dark secrets hidden within its walls.

Från IMDB:
Tensions rise within an asbestos cleaning crew as they work in an abandoned mental hospital with a horrific past that seems to be coming back.