Things are a bit grim at Scotland Yard, this Christmas. On the heels of a nasty corruption scandal, the CID must now contend with a killer who is murdering pregnant women, so as to steal their babies. Chief Inspector Acton doesn't want Doyle anywhere near this case, of course, but she can't shake the feeling that there is more to his concern than his usual over-protectiveness—and more to this case than the usual psycho-killer.