A soldier of the South Korean special forces, Yoon Seo-yi, died in an explosion during a training session. When she opened her eyes again, she found herself in an unfamiliar world, in the body of Estella Cardeine, a fallen noblewoman.

“Please, Your Majesty… Live my life for me.”

At the moment when a dying knight grabbed her hand and begged her to live on, a soul contract was forged. Now, according to the terms of the sacred pact of Cardeine, Yoon Seo-yi’s soul is bound to Estella’s body.

But it’s not easy. Every time she tries to speak in front of others, her words catch in her throat. And only when she closes her eyes and concentrates can she hear a whisper:

“Cardeine’s Blade is not dead… Estella still lives.”

With only her instincts, combat sense, and military knowledge from her previous life, Seo-yi begins to fight back—against a crumbling empire, internal betrayal, and her own fading sense of identity.

This is the story of a soldier reincarnated as a noble lady in a medieval world, leading the fallen Cardeine military to rise once more.

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