Behind the peaceful walls of an impoverished medieval Spanish convent lies a teeming hotbed of ambition, lies and double-crossing as can be seen in this powerful, thought-provoking drama that is based upon Jesus Fernandez Santos' novel. The convent is set in an arid area and sole support comes from the local duke. The plague has been ravaging the surrounding town and panicky residents who are not yet afflicted flee. Sister Angela becomes ill and is nursed by her devoted friend Sister Ana. Angela slowly gets stronger and as she does, she begins reading about the lives of the saints. She begins to believe that the only way to save the decimated village from further chaos is to host a miracle. Sister Angela then has Sister Ana make deep slices into her palms to look like stigmata. The townsfolk believe that Angela's hands are bleeding spontaneously, but the mother superior isn't so sure and sets out to prove the miracle a fake. She can't and the villagers begin to revere Sister Angela as a saint. The mother superior can't bear this, and when Sister Angela is elected the new prioress, she goes over the edge with her desire for revenge. Things get even worse when the duke shows up and promises to give the convent enough support to make them one of the most powerful in Spain if they will host his daughter, who is thinking about joining the nunnery. Unfortunately, the haughty young woman is more interested in running things her own way. The deposed mother superior conspires with her at every opportunity, and when Sister Angela's palms suddenly becoming dangerously infected, the prioress finally gets her chance for revenge.
~ Sandra Brennan, All Movie Guide