On the snowy slope, the milkman Jin Wanxi (Lee Soon-jae) meets the old lady Song Yifen (Yin Xiujing) who collects waste. They each had a hard life in the first half of their lives: Wanxi was self-willed when he was young, and he felt guilty until his wife died of illness; Yifen was abandoned by her beloved man in the corner of the city, and she remained unmarried after her child died. The two old people met on the quiet streets every morning, and their lonely and miserable lives gradually brought them closer. Under the help of Wanxi's granddaughter Yan'er (Song Ji-hyo), the throbbing of first love sprouted in each other's hearts. Wanxi's friend, parking lot manager Zhang Junfeng (Song Jae-ha), has been patiently caring for his wife who suffers from Alzheimer's disease. Until one day, Junfeng learned that his wife had a terminal illness. Witnessing her painful illness again and again, Junfeng, who was heartbroken, made a sad decision... The film is adapted from the work of the same name by the famous Korean online cartoonist Jiang Cao, and the stage play of the same name that has been performed has also been well received.