Jimmy Cook (Sandy McVea), an Aboriginal detective, has been assigned to the Special Service to help Jack Airlie (Snowy Baker) crack a ring of German spies operating in Australia during the First Wo

Jack and Jimmy have discovered the gang’s secret city hide-out. Gang boss Bill Warne (Billy Ryan) escapes, pursued by Jack (Snowy Baker).

Jack (Snowy Baker) has pursued the German spies to the secret beach from which they will rendezvous with a German ship.