It’s Me, Grandmother

Middle-school student Eun Ha lives with her aunt. Her aunt supports herself by working at a karaoke salon. 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.
An old woman is diagnosed of cancer and comes back to her home alone. She writes her last letter without addressing any particularperson. At that time she hears her phone ringing. The lonely old woman wonders who is calling, because no one calls her.