About the title
2019. Twenty-eight-year-old So-yeon returns to her parents' home in the countryside. Her father died long ago, and her relationship with her mother, who is now in the hospital, was never mended. So-yeon has lost her mobile phone, so she plugs in the old landline and begins receiving strange calls from a girl pleading for help. It turns out the stranger's name is Yeon-suk, she is also 28 years old, and she lives in the very same house — but in 1999.
