Ed is delighted to meet his twenty-three year old daughter's fiancé for the first time. Ryan appears to be the perfect future son-in-law. There's just one problem. There's something off about Ryan. Something hidden in the shadows behind his eyes. And it seems that only Ed can see it. Terrified that his daughter is being drawn in by a psychopath, Ed sets out to uncover her fiancé's dark past - while keeping his own concealed. But no-one believes him. And the more he digs, the more he alienates her and the rest of the family who are convinced that Ryan is 'the one'. Ed knows different. For reasons of his own, he knows a monster when he sees one...