Due to an injury to his spinal cord, Se-ha is unable to walk or move from neck down. Dong-gu, on the other hand is tall and strong but has the mental age of a five-year-old.
These two disabled men, though not related by blood, become inseparable when they meet at an institution for disabled children in Seoul.
Over 20 years, the two become each other’s perfect partners. However, their sibling-like relationship is threatened after a person claiming to be Dong-gu’s mother suddenly appears and demands Se-ha ‘release’ her son.