A war among gambling bosses is being waged. Stone and Keller attempt to locate and protect a vital witness from a hit man who has charmed his way into a lonely schoolteacher's apartment in order to secure a clear shot at his victim.

Stone is held hostage by the Cobras street-gang, which demands an exchange for its wounded leader who was captured in a bungled robbery. Keller and Devitt scour the city's seamy underside in their search for their friend and colleague.