A young mother in Amsterdam locks herself out on the worst possible day. Her baby is inside the apartment, and while she goes elsewhere to retrieve the spare keys, an NL-Alert arrives. A nuclear missile is on a collision course with Amsterdam, and many people are seeking safety in a metro station or one of the city's bunkers. But Murphy's Law isn’t done with the capital yet. As the minutes tick away, the phone network goes down, and it turns out there’s only room for a limited number of residents in the bunker.