Simon Brook is a celebrated and flamboyant conductor. When he kills himself, his wife Alex is shocked she didn't see it coming. Guilt-ridden and grieving, she escapes to Hillen Hall, an old house by the sea, abandoning her classical singing career and distancing herself from everyone but her sister Erica. Hillen Hall is an old Brook family home. Once a fine manor house, it is now creaking and unloved. When Theo Hellyon, Simon's cousin, turns up offering to help with its renovation, Alex is confused. She didn't know Simon had a cousin. And Theo is charming and reminds her of Simon so, despite Erica's warnings, Alex cannot resist having him in her life. But the old Hall has a tortured history which Alex cannot begin to suspect and Theo is not what he seems. How long will it be before she realises she's making a fatal mistake?