It is almost a decade since Duluth said goodbye to its innocence. The city creeps ever closer to the tenth anniversary of the year in which it found itself both gripped by murder and united in terror; and during which the pillar of its community, DS Jonathan Stride, had his home and heart torn to ribbons by the claws of cancer.
Cat Mateo, an orphan with a knack of landing on her feet, has bid farewell to a life on the streets. This once-stray teenager owes her rescue to Detective Stride, the father figure she holds close to her heart. But Cat holds something else to her chest - a secret: the sheer power of which she could not possibly comprehend.
A secret that, once out of the bag, will not just viciously scratch at Duluth's still-healing wounds, but will make DS Jonathan Stride wave goodbye to his convictions about the events nine years before, and say hello to his darkest fears.