Retired Detective Inspector Hillary Greene, now working as a consultant for the police, is once again delving into the cold case archives - trying to discover who killed an interior designer at a millennium New Year's Eve party. But the more Hillary learns about her victim, the less likely it seems that anyone would want him dead. To add to her woes, it seems that her lover, Detective Superintendent Steven Crayle, is being lured away from her team with offers of promotion elsewhere. Can she keep her mind on the job - or will this be the first cold case to defeat her?