John tries to overcome the civilization tragedy of this era by tracking the future of man, and Hyun-woo is young people who try to overcome it by tracking the human past. Between them, a woman, So-yeon, who symbolizes that only love is human salvation, intervenes and a love triangle is formed. One day, Yo-seob goes missing while flying a hang glider in Halla Mountain, and Hyun-woo and So-yeon form a family by raising Yo-seob's child, Darin. After four years, Hyun-woo and So-yeon leave for Jeju I...