A professor invents a radium tube that makes internal combustion engines stop running. He and his invention are captured by a gang of robbers. A federal agent is sent to rescue him.A professor invents a radium tube that makes internal combustion engines stop running. He and his invention are captured by a gang of robbers. A federal agent is sent to rescue him.A professor invents a radium tube that makes internal combustion engines stop running. He and his invention are captured by a gang of robbers. A federal agent is sent to rescue him.