The private memoirs and confessions of a justified sinner

Robert is a difficult and disturbed young man. He comes from a troubled family background and turns to his Calvinist faith for solace but finds it hard tp get along with other people, particularely his brother and his dissolute father. After he falls in with the mysterious and charming Gil-Martin his actions become more and more extreme. He convinces himself that he is one of the lucky few who have been chosen for heaven and that therefore all his actions are automatically right and good... even murder.