A secret love, a reunion, and a crush who had not been seen for more than four years reappeared in Su Mu's world at a high school reunion, disrupting Su Mu's seemingly peaceful life. Su Mu thought her feelings were wishful thinking, but Shen Qi'an suddenly responded. Shen Qi'an, whom she had been secretly in love with for so long, suddenly told her that he actually had a soft spot for her. Everything was so unexpected. Su Mu was trapped in a cocoon, and Shen Qi'an was obsessed with it. Their love seemed to be slowly heading towards the best ending, but they never thought that under the beautiful surface, Su Mu's heart was already riddled with holes. When the past slowly returns to reality, when problems gradually surface, are we deceiving ourselves and others, or are we facing it together? Can they still find happiness together...