An orphan girl from a poor family has a shocking secret; a dandy prince has a pure heart. A school adventure in which a woman disguises herself as a man, a ridiculous romance in the academy.
The family is in decline, the mother is seriously ill, and the father has been wronged. In order to find a chance to survive and investigate the unjust case against her family, Su Yunshang, a talented girl from a poor family, took a desperate risk, cut off her black hair, disguised herself as a man, and entered the world's best academic institution, Qingyun Academy, under the name of her elder brother "Su Yun".
At the beginning of the school year, she fell in love with the cynical Prince of Zhenbei, Lu Beichen, because of her "shabby" appearance, and was regarded by him as a "little poor person" who was only interested in profit. She hides among a group of young people in their prime, walking on thin ice, relying on her extraordinary talent and wisdom to overcome difficulties repeatedly, but she does not know that the remains of her father she carries have quietly involved her in a huge undercurrent in the court.
But in repeated confrontations and side by side, the dandy prince who initially disliked her gradually became the person who understood and protected her best. From the tit-for-tat confrontation in the academy's monthly exams, to the tacit cooperation in providing suggestions for flood control, to the shared life and death in the border war...
When a woman's identity is exposed in front of thousands of soldiers, and when the truth that has been buried for many years finally comes to light, how should she maintain her ideals, love, and the righteousness of her family and country amidst the ups and downs?
"Lu Beichen, I lied to you."
"I know. But I, Lu Beichen, will enjoy it all my life."
This is a hymn for young people's growth, and also a deep love that transcends identity and prejudice. See how the orphan girl uses knowledge as a blade to break through the dilemma of fate and create a legend of Qingyun with her loved ones.