Li Qingman, a science student at university, dies unexpectedly. When she opens her eyes again, she finds herself in the Li Dynasty, a thousand years in the past.
Her new identity is Princess Jinghe. After learning about the original owner's short life, she discovers that the girl was a formidable fighter. In an instant, Li Qingman goes from a novice to a skilled martial artist.
Having extraordinary skills was something she could only dream of before. In this unfamiliar place, with the original owner's martial arts to protect her, she should be able to go wherever she pleases.
But then she remembers the original owner's other identity: the number-one assassin of the Rong Prince's estate, Li Qingman. Her joy vanishes without a trace.
Prince Rong is Helian Hao, the second prince of the Great Li Dynasty. He is handsome enough to be called the most beautiful man in Shangdu, but he is also ambitious. In secret, he raises a force of hidden guards and assassins, fighting his fellow princes while also arranging the covert murder of political opponents and wealthy people. He is responsible for numerous massacres of entire households. As his number-one assassin, Li Qingman has become an invincible blade in his hand. Under normal circumstances, that blade could have remained sharp forever. But then the emperor abruptly issues an edict, betrothing Princess Jinghe to Prince Ding, the only prince in the Great Li Dynasty without imperial blood, as his principal wife.
That edict drives the original owner to storm the Prince Ding's estate alone that very night. She dares not openly defy the emperor's command, but she can become a widow. The only man she will ever marry is the one she loves. Anyone else can go to hell.
In the end, she dies at Prince Ding's hands. Now Li Qingman has transmigrated into her body, inheriting the original owner's dual identity. The thought of marrying Prince Ding leaves Li Qingman in a cold sweat. She is sure her wedding night will be the day she meets her end.
The more I look at it, the more it looks like