Takeru Ando, a company employee, suddenly arrives at the snack bar "Tenshukaku" and asks for proof that his wife, Kaho, has abandoned their 4-year-old son, neglected housework, and is 3 million yen in debt. Masako and her family are not convinced by Ando's attitude, which they mistakenly believe to be that of a credit agency, but they are worried about the child, so they decide to begin their investigation... As a result of the investigation by Yamaki and Mitsuko, it turns out that Masae Yamada and her friends control the kindergarten that Kaho's son attends, and that they recommended expensive brand-name bags to their mother's friends as being available at a reasonable price, and that Kaho apparently borrowed money to buy those bags. When Masako visits Kaho's house pretending to be a plumber, she finds a dilapidated room and a weary Kaho...