2014 год. He who pays the piper calls the tune. When Peter and his little sister, Daisy, are evacuated from London to the countryside, they find themselves on an isolated farm in the middle of a treacherous marshland. As Daisy gets drawn deeper into the secrets of their new home, Peter starts to realise that something very sinister is going on. What is that music they can hear at night? And who are the children dancing to it?