Collins and Griffiths

A long-serving beat cop in the Met and a teenage girl fall to their deaths from a tower block in London's East End. Left alive on the roof are a five-year-old boy and rookie police officer Lizzie Griffiths. Within hours Lizzie has disappeared, and DPS Officer Sarah Collins sets out to uncover the truth around the grisly deaths in an investigation that takes her into the dark heart of policing in London.

It's 1987. One morning, 15-year-old Tania Mills kisses her mother, walks out of her front door and disappears. In 2014, when a new lead comes in for Tania's case, DS Sarah Collins is asked to investigate. PC Lizzie Griffiths, the subject of Collins' last investigation, is back on the job and working at a domestic violence unit. When a quirk of fate brings Lizzie and Collins back into contact, each must try to reconcile the claims of the past with the demands of the present.

When a teenage boy steps out of the shadows of Gallowstree Lane and asks a passer-by for help, it’s already too late. His life is bleeding out on the London street. The murder threatens to derail Operation Perseus, a covert police investigation into the Eardsley Bluds, an organised criminal network. Detective Kieran Shaw can’t and won’t allow that to happen. But 15-year-old Ryan has other ideas. He’s witnessed the death of his best friend, and now he wants someone to pay....