Genghis Kahn built an empire that spanned vast regions in East Asia and East Europe. He married the Beautiful Queen who was from Goryeo, a small kingdom in the Far East. Her name was Shen Meng Qi. Meng Qi is known as the most beautiful lady in Goryeo Empire. She is kind, helpful and loyal as always.

But unfortunately, she died when she gave birth to their future heiress to the throne. Many enemies wanted to use that opportunity to kill the child but the mission failed. They couldn't find the child again as some say that she was lost or killed. They searched everywhere but couldn't find the child. Genghis Kahn was forced to marry the concubine of Shen Meng Qi. The concubine name was Jiang Yan Ran. She gave birth to three sons and two daughters.

Meng Qi daughter was named Mu Deok by the Mu family. Mu Yeung is an Archaeologist. He is the King secret personal Archaeologist. Mu Yeung wife also died when she gave birth to Mu Ye Ze. It was strange that they both died at the same time, year, date, month and day. Mu Ye Ze and Mu Deok are of the same age and date of birth. They both love each other sincerely.

Mu Deok is a very talented girl at lying, knitting and gambling. She is both fierce and savage. She doesn't care about being noble or popular, all those things are boring to her. People think she's innocent and cute because of her face not knowing how crazy she's. Some people are used to calling her Crazy!. She's kind and helpful when happy but still crazy while she's fierce, savage and very crazy when angry. Her patience is below average. She's nowhere near being noble. She's also the secret leader in Gambling. She lives her life anyhow and anyway she wants.

Mu Ye Ze is a Gentle nobleman good at Sword Fighting. He's going to be the next watchman of the Soon to be new King ( Jang Ul ). He's always overprotective of Mu Deok. His father gives him ladies to marry but he just refuses them. He's a very gentle gorgeous man admired by many people.

Sa Dol is Mu Deok maid. She's also fierce but not that much. Sometimes she's naive. She always follow Mu Deok to any place she goes to. She's better In gambling than Mu Deok. She has a crush on Mu Ye Ze but she keeps it a secret.