ChandlerandMilesattendthelaunchofBuchan'sbookonmurdersinWhitechapelwheretheyarebaffledbycrypticremarksmadebyaneccentricoldladyLouiseIver.AtthesametimeelderlyvagrantAlexanderZukanovisluredtoahousewithstrangemarkingsonthewallwhereheispressedtodeath,givingthenameDorothyCadetohiskillerbeforehedies.MilesandChandlervi..