After retiring from a successful career as a ballerina, Tan Si Ting (Qin Lan) returns to her home in China. However, her thoughts of a peaceful retirement are soon dashed when she unexpectedly runs into Feng Rui (Wallace Chung), her ex from college whom she hasn't spoken to for thirteen years. Feng Rui, now a single father, struggles with Si Ting's sudden reappearance in his life, as he still has feelings for her despite his anger about how their relationship ended. Can Si Ting and Feng Rui overcome their past misunderstandings and pursue a new, more mature relationship together? This drama was adapted from the novel "Shei Zai Shi Jian De Bi An" (Who is on the other side of time?) by Qing Shan Luo Tuo.