Eighteen-year-old Ha-min(CHOI Woo-shik) suddenly begins to see the number “365” every time he eats his mother’s (JANG Hye-jin) 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(GONG Seung-yeon), an unexpected truth turns his world upside down…