It's 25 years later, and police detective Frank Washington is forced to team up again with his long estranged partner Joe Marshall to investigate a series of assassinations, in a case with ingredients they could never have imagined.

Joe Marshall and Frank Washington are two tenacious police detectives who seek at all costs to stop the Katana, a renegade Yakuza gang composed of violent and sadistic killers who want to lead the drug trade in Los Angeles.