In this delightful story, Mercy is helping a friend whose Mother has become involved with spiritualism. She attends a seance at his home. When the lights come on, one of the participants is dead. The police arrest a servant, the brother of Lulu. Mercy sets out to prove his innocence, in spite of the fact that her Mother has arrived to stay with Chloe. The story has enough changes to hold everyone’s attention. There various funny scenes as Mercy’s Mother and Ernie attempt to tries control Mercy activities. I highly recommend this series set in 1920s.