Mum, there's some people here from college, they asked me back to theirs. Just for an hour or so. Is that OK?

Midsummer 2017- teenage mum Tallulah heads out on a date, leaving her baby son at home with her mother, Kim.

At 11pm she sends her mum a text message. At 4.30am Kim awakens to discover that Tallulah has not come home

Friends tell her that Tallulah was last seen heading to a pool party at a house in the woods nearby called Dark Place

Tallulah never returns.

2018- walking in the woods behind the boarding school where her boyfriend has just started as a head-teacher, Sophie sees a sign nailed to a fence.

A sign that says- DIG HERE . . .

A cold case. An abandoned mansion. A family hiding a terrible secret.