Shiori Hirano and Knox Lofgren are left to run the martial arts program at Black Arts while Ronin Black travels. On the surface, the two highest ranked belts appear to cooperate-but in private, they butt heads constantly, despite the undeniable attraction between them. Soon their power exchanges start to make for a sweltering dynamic in the bedroom. At first Knox is shocked to be living out his submissive desires, but Shiori sets out to prove that embracing his true sexual nature doesn't make him a weak man.