After raising Ataru alone for years, Masaru finally remarries. His adult son is happy for him, but he cannot shake his suspicions about Masaru's young and beautiful new wife, Sara. She cannot handle the housework, spends money carelessly, and, most suspiciously of all, secretly puts on makeup and slips out whenever Masaru leaves for work. Afraid that investigating Sara might destroy the happiness his father has finally found, Ataru tries to bury his doubts...