Trouble descends on the quiet medieval village of Bethanien. Deep in the Black Forest the new abbey church collapses during construction and two men die. Sister Boniface, the abbess, calls in outside help when flaws in design and workmanship become evident. Suspicions arise about one of the deaths: was it natural, or was it murder? Sister Boniface struggles to sort out fact from speculation. She finds herself at odds with Father Karl over how to proceed. Others see the situation from different angles. Questions abound, but answers are hard to come by.