Go Yeong-rye hustles through her hectic days as a bus conductor. At work, she crosses paths with the sharp-tongued Seo Jong-hee, forming an unlikely bond. When Yeong-rye is in trouble, Han Jae-pil rescues her from a dangerous situation. When the fellow conductors try to give Jong-hee a hard time, Yeong-rye steps in to help, and their friendship grows.