World-weary detective and family man, Kenzo Mori, travels to London in search of his younger brother, Yuto – long believed to be dead, but now rumoured to have reappeared in London. Once a troubled but sweet, much-loved kid, Yuto is now wanted for the vicious killing of a yakuza boss’s nephew, a declaration of war that threatens to tear Tokyo apart. The family’s honour, and the fragile peace between the warring gangs back home rest on Kenzo’s ability to bring his brother home.