The background is a parallel time and space in an imaginary era. It tells the story of a young man in a wild mountain village. At the age of 18, both his parents died, and his sister married into the next village. The whole family struggled to survive with only two acres of lowland land. Unexpectedly, something unexpected happened. On an extremely cold winter night, the dog leftover, who lacked clothes, rice, and materials to keep warm, froze to death on the kang of his three-room adobe house. Our real protagonist, another dog leftover, traveled through time.