Having just lost her only friend, retiree Molly’s life is slowly turning into nothing more than a repetition of late nights in front of the TV set and empty liqueur bottles. Perhaps that is why she can’t seem to pinpoint where the regular knocking noises in her apartment building are coming from. Were they always there? Molly grows ever more convinced that someone is fighting for their life inside the building, but the police are adamant that no one has been reported missing. Still, Molly can’t let go of the thought that the knocking is a cry for help. At the back of her mind gnaws the newspaper clip about the dead woman found in lake Råsjö.