Like her surname-sake Jessica, Daisy goes somewhere and there's a body. This time she's at the Tower of London by request of her editor and she stays there to see the key ceremony. She wakes early and really wants to go home to her twins but on her way out she finds a body (quelle surprise). Of course her husband is assigned to investigate, but he has to deal with Tower politics as well as multiplying motives and suspects. It also has a few glimpses into the aftereffects of World War I and the impact it ohad on the soldiers.
Relatively predictable but entertaining.