For many years, Halloween was a special time for siblings Asger (12) and Petra (10) and their neighbor/best friend Ester (12). This year it’s different. Asger and Petra’s father recently passed away, and this was their special tradition. Asger wants to stay home, Ester wants to go to a party, and Petra wants to continue the tradition of trick-o-treating. Unable to let Petra go by herself, the parents force them to celebrate together. But, in a split second, Petra disappears without a trace.
Meanwhile, burglars are roaming the town stalking for the next home to burglarize. They encounter Petra and the game of cat & mouse begins. They end up at an abandoned house where Petra must find a way to out-smart the burglars. At the same time, Asger and Ester must overcome all obstacles on Halloween night to find Petra and return home safely.