This drama is a remake of the 2019 ITV UK television series "Cleaning Up." It tells the story of three cleaners at a financial firm, Eo Yong-mi (Yum Jung-ah), Ahn In-kyung (Jeon So-min), and Maeng Soo-ja (Kim Jae-hwa), who resort to insider trading to feed their families and fulfill their dreams after accidentally overhearing financial information.