简介
NYPD Detective Danny Reagan takes a position with Boston PD. Once in Boston, he is paired with Detective Lena Peters, the eldest daughter of a prominent law enforcement family.。搏击争霸赛期间，程志江让张浩正打假拳未果，失手打死了数落自己的顺子。程志江出狱后，意外夺冠的张浩正接到了打黑拳的邀约。报警后，张浩正充当线人深入虎穴。随着调查的继续，他发现程志江早已不是情同手足的兄弟，六爷也隐藏着巨大阴谋······。