후회로 점철된 채 끝나버린 삶. 우연히 찾아온 두 번째 기회. 세상을 구하기 위한 로난의 모험이 시작된다.
Ronan lived a wasteful life filled with regrets. A second chance befalls him at the end of his futile life. He went back to the time when he was a ten-year-old child! For the people who sacrificed themselves for him, he becomes determined to live a new life.