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.

Determined to change her life, Go Yeong-rye searches tirelessly for the mysterious Giant, only to end up in trouble at a nightclub. Meanwhile, Han Jae-pil negotiates with his father, gaining permission to continue boxing in exchange for studying under the elite tutor, Go Yeong-sik. With Seo Jong-hee, Go Yeong-rye enrols in a night school.

Go Yeong-rye and Seo Jong-hee go on a group date, where Yeong-rye unexpectedly meets Han Jae-pil. The group heads to a roller-skating rink, and Sang-cheol invites Yeong-rye and Jong-hee to watch a boxing match. As Jong-hee watches Jae-pil fight, she is shaken when memories of past violence resurface. Overcome by her trauma, she abruptly stops the match.