At sunset, on the last day of summer, Prince Othilrin will officially receive the title of Crown Prince. Until then, he must protect his title from other nobles attempting to win it for themselves. When one of the nobles introduces his mysterious and reclusive sister, Othilrin believes it is a weak attempt to win the throne by proxy. When the lady wants nothing to do with Othilrin, and seems to despise him, he soon realizes she may need his help, rather than his crown.