Zhou Tian, an ordinary young man, suffered emotional setbacks after breaking up with his girlfriend. One night, returning home drunk, he mistook Jiang Yue'er's twin sister Jiang Xue'er for Jiang Yue'er, leading to a series of absurd and awkward intimate actions between the two. The next day, Zhou Tian bumped into Jiang Yue'er's cousin Jiang Tao at a bus stop, and unexpectedly learned from him that Jiang Yue'er hadn't gone out after the breakup, realizing the mix-up from last night and becoming extremely terrified.