The man who calls himself Vindici broke out of prison last year. Now he's filmed himself torturing and killing paedophiles in Liverpool's affluent suburbs.
Half the city are celebrating: the streets are now safer for their children. But for DCI Eve Clay and her team at the Merseyside Police, it's a nightmare. Their job is to solve crimes and lock up the killer – hard enough without being despised by the public they are trying to protect.
And now, just when they think they've cracked the case, they receive a photo of Vindici at a Day of The Dead parade in Mexico. If Vindici is 5,000 miles away, who are they hunting in Liverpool? DCI Eve Clay must draw on all her cunning to unmask a killer who is somehow always one step ahead.