‘Ji-an’ is a charismatic field manager who rules the construction site, but has a soft spot for her daughter. She has endured hardships with her simple character and simple grit. However, when her daughter 'Hyo-ri', the center of her world, suddenly begins to rebel, Ji-an starts to lose her footing. Just when she thought her life was going downhill, an unexpected first love stirs things up and opens the door to a new chapter.