Henri Loses Her Beau

Henri is short for Henrietta and when a long-legged man appears to walk her to her car, then dies after he sends her flowers (two carnations), she knows it can't be suicide.

She enlists the help of friends, and the orphaned doxie to solve the mystery. Her cat too, can't help get in on the action, at least on the advice. Will they find out what happened? Why would anyone want to murder him?