Hwang Geum-Bok has always been ashamed of her mother, who works tirelessly as a street cleaner to support her as a single parent. Despite her mother’s sacrifices, Geum-Bok struggles to see beyond the shame of her humble, unnoticed life. But when her mother suddenly vanishes during a trip, Geum-Bok is left to grapple with the profound loss and the realization of her mother's deep devotion. Once dismissive, Geum-Bok begins to grasp the depth of her mother’s love and the harsh realities that led to her disappearance. Searching for answers, she uncovers painful truths about the sacrifices her mother made for her, which ultimately drive her to honor her mother’s enduring legacy.