Living in a small rural village, 13-year-old Eun-chul and his sister Eun-ha are on their own when their grandmother passes away. His 6-year-old sister’s wish is to see the biggest creature in the world, the whale, so she pesters him to take her to see one. When Eun-ha’s eyesight deteriorates to a point where she could lose her sight completely, adults tell him to send her off to an institution. But afraid of losing his sister, he cannot let her go. And instead he sets off with his sister on a bicycle to grant her wish; in search for a whale.