Hye-ja, who is struggling with her job in Seoul, dreams of moving up from a semi-basement flat to a studio apartment. Working at an insurance company's call center, she faces challenges at work due to her rough dialect and fiery personality. To borrow money for the move, Hye-ja travels to Busan to see her mother, but no matter how hard she knocks on the door, her mother does not answer.

Jung Eun-ji
as Hye-ja

Kim Ju-an
as Hee-sook

Lee Hye
as Hyun-sun

Woo Joo-young
as Woo-bin

Kang Ji-gu
as Il-hwa

Kim Gang-hee
as Jeong-hee

Ahn Do-kyung
as Jin-sook

Im Hyeong-tae
as Jin-seop

Shin Kang-kyun
as Joong Jeol-mo

Byun Joong-hee
as Bathhouse owner