Two sisters. One life. A deadly secret.

Five years ago, Fiona's sister Amy vanished without a trace.

Determined to find out what happened to her beloved sibling, Fiona assumes a new identity and rents a room in the boarding house where Amy once lived.

It's an eerie place. The landlady speaks to people who aren't there while her son Keith silently observes Fiona from the shadows.

Little by little, Fiona pieces together the truth about the life her sister was living–and the web of secrets and lies in which Amy became entangled.

Then Fiona realizes she is putting herself in grave danger, because someone close has a secret they'll do anything to protect.

But she has to know the truth. She'll follow in her sister's footsteps–even if they lead her to a place darker and more terrifying than anything she could ever have imagined.