Umon’s services are called upon when innocent bystanders, Kayo and Minokichi, along with the ronin, Gontaro are mistakenly identified as suspects in several recent murder cases. To prove their innocence and uncover the truth, Umon launches his own investigation.

• Toei Company
• Ryutaro Otomo
• Kōtarō Satomi
• Satomi Oka
• Kyoko Aoyama
• Chizuru Kitagawa
• Keiko Okawa
• Emi Ito
• Yumi Ito