Hiroshi Nirasaki is in his mid-thirties, the prime of life, and he works for a securities company. Hiroshi never knew his father. As a young boy his mother told him his father had died young. Perhaps it was that early loss which propelled Hiroshi into graduating from a prestigious university and taking a job in the high-flying world of stocks and shares. With a good marriage, a beautiful wife and a son, Hiroshi's life appears to be the dream of most Japanese businessmen or salarymen. One evening, on his way home from the office, Hiroshi is accosted by a raggedy man who claims to be his father. Hiroshi is obviously surprised and confused but agrees to allow the man to stay with them for a while until things are sorted out.