Darcy Anderson (Joan Allen) has been married to Bob (Anthony LaPaglia), for 27 years. They have a happy yet humdrum relationship. One night, while Bob is away on business, Darcy goes into the garage to search for batteries. When she rummages through Bob’s belongings, she stumbles across a magazine showing sadomasochistic images. Unnerved by the magazine – and the fact that it is in Bob’s possession – Darcy finds a secret compartment behind the garage’s baseboard and makes a more horrific discovery: a small box containing the ID cards of Marjorie Duvall, a victim of a serial killer called “Beadie”.