Five swordsmen are murdered and hung from a tree and the chase is on to find the killers. Two magistrates pursue the leads to solve the crime and it leads to a potential conspiracy to kill the Shogun.

The serial killing of a samurai each night by strangulation at various temples confounds investigators and brings a chill to the residents of Edo. With the capital on edge, master crimefighter Kondo Umon is brought in to try and solve the case. His illustrious career aside, Umon must risk his own life, time and time again in order to bring the culprit to justice. This mystery will keep you guessing until the exciting climax. Umon has a flair for the dramatic and will hopefully solve the case before more innocent victims have their lives claimed!

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.

Umon goes on an investigation to unveil the murderer known as Red Lizard.

Detective Umon’s services are called upon when ronin Yaichiro is killed with a peculiar weapon, a stone wrapped in a towel.

Ryutaro Otomo as the Edo magistrate Umon Kondo is out to solve a crime that centers around the murder of a jail guard & the escape of a criminal who is later himself killed. His dying words in Umon's arms were, "I didn't kill the guard." The murdered criminal had been a safe-cracker & only his girlfriend knows where he hid a fortune. She is kidnapped, so the plot gets thicker & thicker.

A kabuki actor is assassinated during a New Year celebration show, in front of everyone, fortunately the great detective Umon is among the audience. Along with his quirky assistant they set on the trail of revenge killing. Revenge for what? Who and where is the killer? And what does a treasure and swastika spider tattoos have to do with the case?