Information for Doubt - A Parable at Theatre Royal, Bath (Play). A Catholic school in the Bronx, 1964. Sister Aloysius, the strong-minded Principal has her suspicions that one of her teaching fathers is abusing a vulnerable pupil. Without proof, she is forced to take matters into her own hands. As the elements of her investigation come invigoratingly together like clockwork, the gripping story poses fascinatingly nuanced questions of moral certainty.