A third limp adventure for Sister Mary Helen, who lives and works at San Francisco's Mount St. Francis College (Advent of Dying). A visit to New York for a convention of the Older Women's League has revived Mary Helen's old friendship with widow Erma Duran, a fellow San Franciscan. Expecting to hear from her after their return home, Mary Helen, her sidekick Sister Eileen, and other members of the League are much disquieted by Erma's seeming disappearance. Several days and numerous unanswered phone calls later, they're allowed into her apartment by Al Finn, her landlord, who also employs her in the ground-floor restaurant he owns. They find the apartment empty, her suitcase and clothes in place, and Finn insisting that Erma had gone to St. Louis to escape her grown, troublesome children. Mary Helen is unconvinced--and after fruitless attempts to involve her policewoman friend Kate Bassetti (Kate has other things on her mind), she takes matters into her own hands as usual and finds herself confronting a short-fused killer. No surprises here--no real animation or suspense, either. Lots of genteel chitchat and much to-and-froing through the streets of San Francisco--this story's only strength. Harmless but ho-hum.