As a young lady from the Prime Minister's Palace, Sun Wenyin fell in love with Prince An Yao and An Lan at first sight. She was so overwhelmed by love that she did not hesitate to use all means to deceive her into becoming the princess. At first, Yao Anlan only regarded it as a calculated marriage and got along with Sun Wenyin with basic respect. However, time quietly changes everything. In the trivial daily life, Yao Anlan gradually discovers that Sun Wenyin has unknowingly become an important person in his life that he cannot let go of.