In a fit of murderous rage after the pards have blown up the Blue Pelican, a gambling den run by an associate of the sect the Daughter of the Dragon, the Chinese move to the counter-attack: they attack Mike Tracys Hotel Alameda the headquarters of the rangers and kidnap Kit Carson. Combing through the stinking sewers of San Francisco our heroes arrive just in time to liberate the old lion: tied to a nailed panel he was about to be fed to the rats. According to the law of an eye for an eye, a tooth for a tooth, the famished creatures devour the would be executioner instead, The Black Claw!