Detective Isshiki's murder investigation is suspended by the Metropolitan Police Department. He is instead assigned to meet detective Kamonohashi Ron.

Despite his supervisor's skepticism, Ron is keen to involve Toto in investigating a case where coins disappear from a piggy bank.

At Benizome Inn, Ron and Toto encounter a friendly innkeeper with a hidden identity.

After a murder, Ron listens to the other guests' testimonies and begins his deductions; Spitz secretly rejoices at this chance to catch Ron in the act of sleuthing, but outwardly both he and Amamiya entrust the investigation to Toto.

Kawasemi Omito leads a joint investigation into a serial killing case.

Ron loves a certain TV show that puts psychic abilities to the test; during a live broadcast, a psychic claims he can control minds with written words, but his neurosurgeon opponent refutes his claims.