 Amos Norton is out to get control of transportation to the gold fields. First he has Black Bart wreck Liddell s stagecoaches making it look like the work of railroad owner Benton. Then he has Black Bart go after the railroad. Jeff figures out who Black Bart is and he and Gabby try to break the next raid. But Benton s men capture them and thinking they are part of the gang, put them in jail.