England, 1917

Reeling from the death of her fiance, Stella Marcham welcomes the opportunity to stay with her pregnant sister, Madeleine, at her imposing country mansion, Greyswick - but she arrives to discover a house of unease and her sister gripped by fear and suspicion.

Before long, strange incidents begin to trouble Stella - sobbing in the night, little footsteps on the stairs - and as events escalate, she finds herself drawn to the tragic history of the house.

Aided by a wounded war veteran, Stella sets about uncovering Greyswick's dark and terrible secrets - secrets the dead whisper from the other side...