After a traumatic car accident, Jeongwon develops a fear of four-wheeled vehicles. Unexpectedly, during the new semester, she hitches a ride on Kim Jisoo's bike and instantly falls for him, experiencing a newfound sense of liberation. Jeongwon's friend Hwayeon notices her affection and becomes anxious. Despite Hwayeon's attempts to keep them apart, Jeongwon is drawn closer to Jisoo. However, Jisoo distances himself from Jeongwon, while Hwayeon's erratic behavior hinders Jeongwon's budding emotions.