Eighteen-year-old Ha-min suddenly begins to see the number "365" every time he eats his mother's homemade meal—and the number drops with each bite. Believing it to be a countdown to his mother's death, he distances himself from her and her cooking. Years later, still haunted by the number, Ha-min lives cautiously, preparing for the worst. Just as he begins to find peace with his girlfriend Ryeo-eun, an unexpected truth turns his world upside down.

Choi Woo-shik
as Ha-min

Jang Hye-jin
as Eun-sil

Gong Seung-yeon
as Ryeo-eun

Kwon Da-ham
as Min-hyeong

Ahn Dong-gu
as Seok-jong

Yang Kyung-won
as Chang-seok

You Chea-myung
as Ha-min's father

Jang Yeon-woo
as Ha-min's brother

Kim Young-min
as Doctor

Song Geon-hee
as Coworker