Adam is a charismatic tutor who charms his way into the life of the wealthy Tanner family while they're on holiday in Greece. When the family's nanny falls dangerously ill, Adam orchestrates his way in to their London home and his true vengeful nature begins to emerge...

Adam now starts to turn Jamie Tanner and Nat against each other and secretly plots to bring down the entire family. When Adam's obsession with the family raises questions, those who dig deeper into his past find themselves playing a dangerous game. With his world collapsing around him, Jamie starts to realise that Adam may be responsible for all their recent disasters - but is it too late to save his family?

In this revenge thriller that proves the past never stays buried, one question remains: how do you protect your family from the enemy within.