Secrets lurk behind closed doors. This truth is made chillingly clear when Lachlan Harriot, a hapless suburban househusband, ransacks his wife Susie's home office in a desperate attempt to find evidence of her innocence after she is convicted of the murder of a paroled serial killer who was under her psychiatric care. But in that room Lachlan was once forbidden to enter, he discovers a disturbing history: transcripts of private conversations, photographs, letters betraying illicit affairs and false identities. While Susie languishes in jail, Lachlan's hunt for the truth becomes an unrestrained plunge into a netherworld he never imagined, full of deceptions he never suspected.