Female investigators have been disappearing one after another due to the vicious crime organization "Kurogashira". Meanwhile, one woman has managed to corner a member of Kurogashira's gang and extract information from them. Her name is Nana. In fact, she is a female professional wrestler who goes by the ring name Pinky Nana. She is a strong-willed, skilled fighter who is good at ground fighting and can push her opponents to the point of unconsciousness. The strongest woman has arrived. Now, the battle for Nana's prestige begins.