Mayo, the Black Angel, is ordered to assassinate a powerful syndicate leader. The hit goes awry, however, as the crime boss' bodyguard steps in the way. It's none other than Yamambe, who once rescued Mayo from a rape and has lived in her heart since then.

Black Angel follows the journey of a tough and determined woman seeking revenge for the murder of her family. With a dark past and a tragic history, she becomes a one-woman army against the yakuza and organized crime in Tokyo. Filled with intense action, gripping drama, and a relentless pursuit for justice, Black Angel showcases the strength and resilience of its female protagonist.