Umberto Lenzi directs this action-packed Italian crime thriller. After escaping from prison, rising criminal Luigi 'Chinaman' Maietto (Tomas Milian) orders a hit on Inspector Tanzi (Maurizio Merli) who put him behind bars. Unfortunately for him, Tanzi survives and vows to do all he can to return Maietto to the prison where he belongs. But if he is to catch him, Tanzi must work outside the law when he denies his superior's request to go into hiding, instead preferring to catch Maietto himself.