After the sudden and unexpected death of her parents Matilda Jones moves from her comfortable, easy suburban life to live with her Uncle in the small coastal town of Colherns Point. But soon Matilda realises that the town is not the idyllic seaside resort it at first seems when she discovers that every six months a teenage girl mysteriously disappears, only to turn up brutally murdered with evidence of ritual sacrifice and witchcraft. Are there truly Witches living among them? But as the pattern is broken questions begin to be asked about who is really behind the murders. And myth and conspiracy are uncovered as Matilda and her new friends start getting closer to the truth... and become the unwitting targets of the sinister and secretive 'Assembly.' Maybe the true monster is the town of Colherns Point its self.