Retired Yakuzas open a ramen restaurant and become an overnight sensation, thanks to their recipe developed in prison. But a mysterious upstart gang is taking down every Yakuza family one by one, drawing the chefs back into the gangland underworld once more! But trouble follows when former rivals Jin (Hitoshi Ozawa) and Kazu (Kazuyoshi Ozawa), whose gang was also disbanded by Gizmo, open a competing shop nearby called Ramen OZAWA. As a fierce ramen rivalry erupts, Gizmo's sinister influence closes in once again.