After losing his father, a young man lives with his mother, giving up his dream of attending university to follow in his father's footsteps as a carpenter. He begins working under Atsumi, his late father's close friend who has always treated them like family. However, Atsumi has been secretly involved with the boy's mother, Sae. When the son discovers the truth, he is torn between loyalty, love, and betrayal. A dramatic story unfolds as he confronts the fragile bonds of family and the overwhelming surge of conflicting emotions.