When DCI John Blizzard visits a friend in hospital, he is intrigued when an elderly villain in the next bed begins to reveal what he knows about Hafton's criminal gangs. The news attracts a series of sinister characters to the ward. Are they seeking to silence the old man? Blizzard thinks so but fellow detectives are sceptical, arguing that the pensioner is simply suffering from dementia. It's only when people start dying that his colleagues take the DCI seriously. The ensuing events become a race against time to save lives and bring Blizzard into contact with a part of his past he has tried to forget and with the one man he fears.