When Sister Joan of the Order of the Daughters of Compassion is transfered to the convent in Cornwall she goes wth instructions from the Mother Superior to solve the puzzle in the last letter of a dying nun. On the surface, all is sweetness and light in the convent on the moors, but it does not take Joan long to detect that there are som ugly shadows lurking beneath and some very suspicious circumstances to be explained. There is the novice who vanished, and the statue that doesn't fit, and the accident that might not have been an accident at all. And who is the young man hiding in the bracken? In an atmosphere of silence, prayer and increasing menace, Sister Joan, a natural rebel, tries to discover the truth and set it right without violating the vows she has taken. This mystery novel is the first in a series about a modern young woman who has chosen to live under medieval discipline, and finds that only too frequently her two worlds collide.