Middle-school student Eun-Ha (Nam Ji-Hyun) lives with her aunt (Lee A-Hyeon). Her aunt supports herself by working at a karaoke salon. Eun-Ha lives in fear that she will end up like her aunt. Eun-Ha is worried about making payments for her school. She then hears of "voice phishing." The scam works by calling lonely old people and pretending to be their grand daughter. The perpetrator then steals money from them.
An old woman (Na Moon-Hee) is diagnosed of cancer and comes back to her home alone. She writes her last letter without addressing any particular person. At that time she hears her phone ringing. The lonely old woman wonders who is calling her, because no one calls her.
