You are the first wife of Mingyu, a king of the largest empire CARAT. You are the queen of that kingdom, while Mingyu has another empress who is also close to you, Irene. Irene has a 5 year old son, Vernon, while you don't have a son yet, that's why Vernon is now the crown prince. Vernon is also like your own biological son even though he was born from the empress, but if you become pregnant, Vernon's position as crown prince will be replaced by your children. Too bad, in those six years, you had difficulty getting pregnant.

Today you and all the women in the kingdom are worried because King Mingyu and his troops are away at war. But Mingyu's younger sister, Minseo tries to cheer you up by visiting the old history warehouse of the kingdom, looking at the old chalkboards that are protected items in the CARAT empire. When you read the history written there, you saw the writing that was slightly faded at the end, you asked Minseo but her answer surprised you.

"My late father executed a soldier who accidentally erased the writing, that's why this chalkboard is protected here. Your majesty the queen, you know that anyone who touches this chalkboard and damages it will be sentenced to death, right?"

You nodded, then you felt concerned when Minseo told you that Empress Irene asked Mingyu not to remarry. The kings of that era married at will, which means Irene has to be ready if Mingyu has a new wife. But you understand because in the past, you also didn't want Mingyu to remarry, but you accepted it wholeheartedly and now you are grateful because Irene-- now the CARAT Empire has a crown prince.

While you were busy chatting, suddenly you and the king's younger sister were surprised by the sound of commotion outside the kingdom. When you came out, Irene was already being held by the intruder.

"Where is the Queen of the CARAT kingdom if you are just the king's concubine?! She will be a prisoner to cripple the CARAT King on the battlefield!"