Detective Kazami (Kazuyoshi Ozawa) is on the trail of his target, a mysterious woman. His investigation leads him to a secluded mansion where he witnesses more than just a drug deal—he stumbles upon a brutal murder. The killer? An Asian man who effortlessly eliminates multiple yakuza in a flash. As Kazami delves deeper, he uncovers whispers of this enigmatic figure in Okubo. Their paths cross unexpectedly, and tension rises as they come face to face. A single gunshot pierces the man's shoulder, throwing them into chaos. With Kazami's help, the two narrowly escape. Thus begins the peculiar cohabitation of "the man who saw too much" and "the man who was seen."