After the chaos of two serial killers in Altswood, the island is finally at a calm. Luca Fern and Gabriel Kingston have become media darlings: the heroes of Bottle Island that every tourist wants a photo with. That is, until philanthropist Maire Reeve drops dead, and the two are accused of her murder. From power couple to homicidal duo, the stakes are high as the conspiracy threatens to destroy the very foundation of Bottle Island. As if that wasn't bad enough, Luca is receiving ominous notes asking her to solve a mystery that she has nothing do with. Or is a previous tragedy in Altswood the very cause of her current situation? As old secrets resurface and mix with new suspects, it is clear that this is not only a grudge against the present, but an avenging force from the past. Despite how much Luca wants to leave the Hunt behind and move forward, it all ends where it began: with the death of Beatrice Willis.

Months after the killer of the Hunt has been locked up, a new string of deaths are pulsating through Bottle Island. This time, the police are quick to insist on simple causes: suicide, accident, unexplained heart attack. Anything except murder. But Luca Fern is seeing a pattern. The winter break has arrived and boatloads of tourists are settling on the island, creating a stream of faces that come and go. When a previous victim of the Hunt returns to Altswood and unveils a revelation, it is clear that the case has not been solved. Bottle Island has more secrets than truths, and Luca refuses to believe her paranoia has finally won over her. The Hunt has come to an end, but the killings have not.

Luca Fern has been a girl with a morbid fascination for disguises ever since a case of mistaken identity lead to her mother's murder. Moving to Bottle Island was supposed to heal her obsessive behaviours, but instead it has revealed a mystery that could swallow her whole. As tradition on the island, Altswood High School organizes an annual game called the Hunt: a thrill-seeking contest among peers of seek and eliminate. But this year, instead of an innocent paint pellet, players are being eliminated permanently with bullets to the head. The head investigator, Luca's own father, is stumped as the death toll increases. Soon Luca will be next, and if she cannot bring light to the hidden secrets within Altswood High's traditions, then she too will die in this twisted version of the Hunt.