AustLit

A merchant marine ship is sunk off the coast of Australia by two marauding German cruisers, leaving one survivor, Jack Rawson. After drifting on a raft he lands on island and discovers is an enemy munitions base but is soon captured. After overhearing a plan to raid the Australian coast he manages to escape and eventually makes his way to Sydney. Before he can tell the authorities he is kidnapped by German spy Fred Smith (aka Frederich Schmidt). After tying Jack to a chair in a wooden building and setting fire to it Smith helps a German raiding party land near Sydney. As they begin to wreak havoc, Jack is rescued and helps fight the Germans, inspiring some workers who have gone on strike to join in the battle. When Jack becomes stranded behind enemy lines he discovers his fiancée, Marion is being held captive. He goes to rescue her and finds her being molested by Smith. Marion shoots Smith and kills him. The film ends with the couple being married.