Searching for my ancestor Peter Ibbetson, who killed his uncle Colonel Ibbetson, who he thinks is his uncle but is actually his father, defending a lady's honour. He was saved from execution by his lover, a noblewoman, but can never see her. They met in shared dreams, and at last after she died.
(Just joking! there was an opera by this name performed at the New York Met, and a movie starring Gary Cooper as Peter in the 1930s).