The husband's father comes to live with a married couple who have been married for five years. The condition is that he never drinks alcohol. The wife, Yuri, is happy to accept, saying, "As long as he doesn't drink alcohol..." She works hard for her husband, Takeshi, and her father-in-law, Haruo. Haruo is usually a quiet and good person. One day, he gives in to the temptation of alcohol...