The London debutante season is in full swing. Tragically, there's a deadly blackmailer on the guest list. Who could it be? To find out, Alleyn plants a dear friend in the midst of a very aristocratic crowd, but a murderer beats him to the punch. With the demise of his "mole, " Alleyn must employ all his sleuthing skills--and social connections---to host a killer's coming-out party.