In a decaying kingdom ruled by oppressive Kings, Elara Shin and Park exist as elite outsiders within the royal guard. The plot follows their journey as bitter rivals who are forced to work together as the Kings' era begins to collapse into war. While they clash constantly, Elara with her disciplined seriousness and Park with his mocking defiance, there is a powerful, unspoken attraction between them. The history is a high-stakes game of cat-and-mouse where they must decide if they can trust.