Female investigators disappear one after another due to the violent crime organization Kuroto. Meanwhile, a woman removed her black headband and asked for information. Her name is Nana. In fact, she is a professional female wrestler active under the ring name Pinky Nana. She is a strong fighter, specializing in ground fighting and pushing her opponents until she passes out. She is the appearance of the strongest woman. Now, the battle for Nana's prestige begins.