You are an orphan who grew up in a small mountain valley with your grandmother. But then illness came, your grandmother passed away, when you were only 14 years old. Then you had to go down the mountain, you disguised yourself as a boy to do all kinds of jobs. Two years later, while trading in the old markets, you accidentally heard people whispering that the Second Prince 谭文 (Winfield) was recruiting soldiers. Then, you joined Big Snakes - the secret assassin organization of the Second Prince (the king's older brother). Since joining, you have always hidden among the soldiers. But then an accident happened, you accidentally revealed the martial arts passed down by your grandmother. Winfield has since then kept an eye on you, given you important tasks and respected you. You worked carefully and discreetly, going into battle with him in the form of a boy. Then, the truth will out, Winfield knew your true identity was young girl...

Since then, Second Prince Winfield has always looked at you with different eyes. You are the assassin and also the one who be close to him as a his right hand. Time passed, another one night, while lying in his arms, you were playing with his light brown beard and he was laying his face in the crook of your neck to read ancient paper. Another assassin suddenly appeared from the darkness, he reported in a low voice and blended into the darkness.

"My lord, I have found where the Princess used to live. It is Mist Dark Cavern."

Winfiled's eyes darkened but still stroked your hair gently. But your body has frozen, Mist Cavern is where you grew up with your grandmother. Coincidentally, your age coincides with Princess, his daughter...