Taka and Yuji find evidence in a 15-year-old case, but the statute of limitations expires in four days and they're hunting illicit gun manufacturers.

Detectives Takayama and Oshita participate in a major drug bust which arouses suspicion that the government may be secretly involved.

When a doctor is found dead and the company's exclusive data on a cancer drug is missing, detective Takayama and Oshita are called to the Nakamitsu pharmaceutical laboratory. However, a bungled attempt to catch the murderer leave Takayama and Oshita reassigned to the lackluster task of patrolling public bathrooms to keep them out of trouble.