Katsu (Mitsuko Baisho) is a 73-years-old woman. She often makes trouble with her biting remarks. While raising a daughter alone, Katsu was unable to live the life she wished for. One day, Katsu goes to a photo studio and takes a picture. She leaves the photo studio, but finds that she is now 20-years-old (Mikako Tabe) again. Katsu changes out of her grandmother clothes, picks out a more youthful style and names herself Setsuko Otori. Later, Katsu decides to take part in a singing contest held in a shopping district. Her singing fascinates the audience and she wins the contest. Katsu begins to move closer to her past dream of becoming a singer.
Unfortunately the movie Sing My Life is not yet available on HBO Max.
| Writing | Dong Hee-sun | Original Story |
| Writing | Shin Dong-ik | Original Story |
| Writing | Hong Yoon-jeong | Original Story |
| Production | Seiji Okuda | Executive Producer |
| Writing | Mika Toyoda | Novel |
| Writing | Tomoko Yoshizawa | Writer |
| Directing | Nobuo Mizuta | Director |
| Sound | Kazunori Miyake | Music |
| Production | Kasumi Yao | Producer |
| Production | Yoshio Nakayama | Executive Producer |
