Valliammai is an 8-year-old girl living in a village who develops a strong desire to ride the bus after watching it pass through her street each hour. She carefully plans a secret trip on the bus one afternoon to visit the nearby town. On her first journey, she is fascinated by the sights outside and enjoys interacting with the conductor, though she is bothered by an elderly woman passenger. While she is excited to see the town, she is too afraid to get off the bus alone. The return trip is more somber after seeing a dead cow by the roadside.