Two Army couples stationed in Frankfurt, Germany in 1985.  Roger, a company commander; Bryan, an Army JAG Corps criminal defense attorney; Zoey, Roger's wife, formerly a bartender, knew Byran while he attended law school; Zara, Bryan's wife, Moroccan jazz bassist, met Bryan at Le Chat Noir in Paris.  One wife, fervently loyal to her husband; the other, fervently bending rules to their breaking points.  Zoey's dark obsessions cause her to forfeit her life at the hands of an assailant she should not have trusted.  The quest for justice and the adherence to dying wishes in Zoey's diary lead to fulfilment for some but cost three more lives by their achievement.  A mystery reserved for adults, age 18 or better, if you please.