Cheng Huan, the female lead, unexpectedly ran into Liao Jia, her senior from high school at the same company when she got off work. Taking these opportunity to hitch rides from Liao Jia, the number of times they met each other increased wildly. Because of all sorts of reasons, Cheng Huan was always able to get a ride from her senior. Unconsciously, they began to realize each other's feelings—every ride became a chance for them to escalate their relationship.