Xu Yiren loses both her relationship and career in one night. Her close friend, Xia Di recommends her to an architecture company as the assistant of the CEO. However during the interview, she finds out that the CEO is the person who exposed that her boyfriend is cheating on her in public, Fang Zhiyou. Though she doesn't know why, Xu Yiren eventually gets the job, but gets handled a weird task - to lie for her boss. But Fang Zhiyou's tendency to expose her lies in public always lands her in sticky situations.

Yan Ze, an ordinary high school student, secretly loves her classmate Ji Xiaowei but feels overshadowed by her best friend, the beautiful and successful Xi Ye. Both friends secretly envy each other’s qualities, leading to unexpected revelations.

Young Blood Agency is an investigative agency during the Republican era that is dedicated to solving mysterious cases. Their reputation has risen with every mystery they solve, but the cases are not as simple as they seem as it relates to unsettled animosity from the previous generation. The four members of the team suddenly realize that they have complicated ties to each other.