How well do you really know your husband?

Grace Dalton is trying to put her life back together after her husband, John, died suddenly in a hit and run. Her perfect world is collapsing around her, the home she hoped to fill with children is huge and empty and she’s paralysed with grief.

But as Grace sorts through her husband’s belongings, she realises the man she loved was lying to her. There’s a mysterious list of names hidden among his things, a secret bank account and a shocking revelation about his family that he kept from her since the day they met.

Who was John Dalton?

As Grace tries to identify the names on the list she realises something is wrong. She’s imagining things: seeing John in the faces of strangers and finding things in an entirely different place to where she’d swear she left them.

Is Grace losing her grasp on reality, or is someone trying to stop her finding out the truth about her husband?