How do you find the missing when there's no trail to follow? DC Lucy Clayburn is having a tough time of it. Not only is her estranged father one of the North West's toughest gangsters, but she is in the midst of one of the biggest police operations of her life. Members of the public have started to disappear, taken from the streets as they're going about their every day lives. But no bodies are appearing - it's almost as if the victims never existed....