One way in. No way out. 

'Deaf teenager goes missing in Esseberg. Mountain rescue are launching a search party but conditions hinder their efforts.

The tunnel is being kept open all night as an exception.'

When journalist Tuva Moodyson reads this news alert she knows she must join the search. If this teenager is found, she will be able to communicate with him in a way no one else can.

Esseberg lies on the other side of a mountain tunnel: there is only one way in and one way out. When the tunnel closes at night, the residents are left to fend for themselves.

And as more people go missing, it becomes clear that there is a killer among them ...