E la signora Delaney scomparve

Myriam Delaney, a guest at the Fair Mansion and friend of Grandma Lillian, has mysteriously disappeared. He doesn't answer his cell phone, his clothes and suitcase are in their place. Lately she had been distracted, taciturn, with her mind elsewhere. From telephone records, Julia traces the number of a private detective of dubious honesty. Why had Mrs. Delaney contacted him? And does the reason for the disappearance have anything to do with that investigator?