The Exiled Young Lady Enjoys Tea with a Female Knight in an Enemy Nation

At a royal ball, Duke's daughter Lizette is suddenly condemned and banished by her fiancé, the prince. However, there are far too many inexplicable points in this condemnation drama. The king who fell ill at an unnatural timing, the mysterious baroness who suddenly captivated the prince and rose to prominence... Why did the Duke's daughter, who should have been perfect, fall from grace so easily? Astrid, a knight from the former enemy nation Zelnika, receives a top-secret mission with unclear details and heads to a remote villa. Waiting there was none other than Lizette herself, who was supposedly banished. She smiles with such elegance that one would never think her a victim, and begins to recount her own banishment drama as if she were a screenwriter who knows the script. Then she poses a riddle to Astrid. "All the answers lie within my story. However, when you reach the truth, you must abandon your future as a knight and become mine." What Lizette speaks of is a distant past promise that binds the two together. Is it the key to solving this mystery, or a trap to ensnare Astrid? Who is the true mastermind behind Lizette's downfall? What is the real reason she is being protected in a former enemy nation? When all the mysteries are solved, what shocking truth will Astrid discover, and what will be the price?