Yun Xiaoxi (played by Li Yingying) studied fashion design in college and has strong business skills. On an opportunity to go out to repair a dress, she met her college classmate Xia Duo (played by Jiang Yan), but was falsely accused of stealing her wedding ring. Yun Xiaoxi hid in the bathroom crying out of grievance and met Cai Tianmu (played by Ding Yuxi), a lawyer who failed in a blind date. At this time, Yun Xiaoxi realized that she had mistakenly entered the men's bathroom in a hurry. When she was embarrassed and at a loss, Cai Tianmu helped her out. The two met for the first time. After returning home, Yun Xiaoxi received a call from her bestie Nana (played by Huang Miyi), and the two made an appointment to drink. After getting drunk, they both said that they wanted to go back to the past and change the thing they regretted the most. Nana regretted marrying her philandering husband Yang Yikai (played by Zhang Kaitai), and Yun Xiaoxi regretted being falsely accused of plagiarism in the university's "Designer's Character" competition but failed to defend herself, so she carried the reputation of a "plagiarist" and also lost her beloved mother (played by Wang Lin) who depended on her for life. On the way back home, Yun Xiaoxi met a mysterious man who gave her a bottle of medicine that could "return to the past". Yun Xiaoxi took the medicine with the hope that there was only a 1% chance of her returning home. Then she felt her body lightly falling into a colorful world.