A Vow of Devotion

The Convent of the Daughters of Compassion, high in the Cornish moors, is short of postulants -- so the impending visit of Bernadette and Magdalen, who are considering entering the religious life, is awaited with pleasure. On her way to greet them at the station, Sister Joan cannot realize that obsession and murder will follow right behind them. New Age travelers are camping on the moor, roses and hats are making a strange appearance -- and it is for Sister Joan, with help from Brother Cuthbert and Detective Sergeant Mill, to discover the identity of a lover who kills . . .