In The Castle of Otranto, much of the plot surrounds one unexplainable incident: a giant black helmet falls on Prince Conrad, thus killing him. Because of Prince Conrad's death, Manfred, his father, captures a passing peasant, Theodore, and pursues Isabella, Conrad's fiancee. Later, it is learned that Jerome (the minister) is Theodore's father. If the helmet had never fallen on Conrad, Manfred never would have stopped Theodore, and Jerome would never have found his long lost son. Manfred, still believing that Theodore is guilty of dropping the helmet by sorcery, is ready to execute him.
At this point in the story, Isabella's long lost father appears, which halts Theodore's execution. It is later learned that Isabella's father found her because a dream he had led him to a monk, who led him to Otranto. The supernatural event here is the dream, which turned out to forecast reality. He accuses Manfred of not being the rightful ruler of