Eris must fight to protect her family and the Shadowblade Brotherhood.

SYNOPSIS:

In the heart of the futuristic streets of Chicago, Eris 'Rosa' Cummings has finally found a moment of peace after the chaotic events of “Knockout 3: Silent Fury.” Living a quiet life with her beloved Karis, their growing family, and her bakery business now thriving across the world, she believes that the life of danger is now behind her. However, that tranquility is shattered when Ryker Wong, a ruthless ninja clan leader known as Kage, emerges from the shadows with a deadly ultimatum for the Shadowblade Brotherhood—surrender or face annihilation. When Master Xai, the wise and formidable mentor who once trained Karis, Eris, and Lena, arrives in Chicago, he carries the grave news of Kage’s attacks on the brotherhood, he believes that only Rosa possesses the skills and strength to take him down.