Zixi (Sun Yizhen), a college student in 2003, tidied up her room one day and accidentally found a mysterious box full of love letters left by her mother Zhuxi (acted the role of Sun Yizhen). While reading, she was reliving her mother's memories of her first love. In 1968, Zhuxi was a pure and lovely girl who fell in love with a poor student Junhe (Cao Chengyou) at first sight. Due to Zhuxi's illustrious family background, their love fell into the painful entanglement of the stereotyped door and the wrong family. The love of Zixi in 2003 is also bumpy, she is secretly in love with Shang Min of the Drama Institute (Zhao Yincheng), but it has been difficult to express her love. Cleverly, Zi Xi found that her mother's first love story was very similar to her own. Can you be happy? Or is it as difficult to find as a mother?