All families have secrets... some are deadly.

When D.I. Matthew Denning is called in to investigate a house fire in a North London street, he never anticipated the horrors that awaited him. As Denning and D.S. Molly Fisher search the wreckage, the bodies of the Galloway family – Brian and Ellie, son Simon, daughter Amber and 9-year-old grandson Caleb – are discovered in the smouldering house.

All evidence points to a tragic accident… until Matthew and Molly discover that the family was dead before the fire, murdered in their home by a faceless psychopath. What started as a routine investigation swiftly turns into a murder investigation, with Denning and Fisher hunting a killer who has wiped out three generations with a shotgun.

But as the case deepens, Denning and Fisher discover that the Galloways were no ordinary family. Like all families, they harbour secrets - but unlike others, their secrets were so deadly, someone is willing to spill blood to keep them hidden…