Panic grips the streets of London as a deranged killer begins targeting high-profile influencers. At the same time, Jessica Hunter is back in her hometown for the holidays, accompanied by her schoolfriend Kenta Higashi. While Jessica grows restless during her summer course at King's College, Kenta is captivated by his first visit to London. Seeking a distraction, Jessica throws herself into the murder case that has left the police baffled. But as the influencer murders draw Jessica and Kenta deeper into their sinister orbit, the young sleuths are thrust into unexpected worlds—from the nocturnal realm of urban explorers to the shadowy circles of London's elite celebrities. With the media in a frenzy and the city's eyes fixed on who the killer's next victim might be, Jessica and Kenta uncover a mystery darker than anything they've faced before—one that pits them against a foe more twisted and deadly than they could have imagined.