Young-eun, who works at a water purifier company, is hypocritical and out for her own. She finds Yong-hee, a dim-witted and over-friendly piano turner who works on the first floor, uncomfortable and tries to avoid him. But she tags along with Yong-hee when he makes house calls one day and luckily sells water purifiers. She continues to go around with him taking advantage of his help even though she doesn’t like being pestered by him.