Three years after the breakup, Lin Xidang, who thought she had put her past behind her, received a call from Yi Yuanxian, and she understood that that person was still in her heart. But the past has passed, and now is no longer the past. Lin Xi knows that even if she still likes it, she can't look back. Lin Xi met Li He during her internship, and the two broke into each other's lives by mistake. Should he choose his first love Yi Yuanxian or Li He who has always protected him? Run, big watermelon!