Megumi Kyoda, a widow who runs a flower shop, witnesses a corrupt police officer killing a colleague in an underground parking lot. Megumi, fearing for herself and her son's safety, Tsutomu, consulted with a former police officer, Yamazaki, who was an acquaintance, and was introduced to the international bodyguard , Shin Enjoji , who is a master of karate. From now on, Shin becomes the bodyguard for these two, while trying to catch the corrupt officer. (Source: MyDramalist)