Writing
G-Man Ted Riley is ordered to investigate happenings at Diamond Island, where a bogus Major Gray is reported engaged in manufacturing a new brand of secret gas for his own purposes. Riley blows up his motor boat just off the island and is picked up by Gray's men. On the island he discovers chemist Professor Baker (John Cowell) and his daughter, Anne, are held captive by Major Gray.
A lawman who brings in a killer only to see him freed because of corruption turns in his badge & sets out on his own to rid his town of killers & crooked politicians.
"Wildcatter" Dave Warren and his crew are trying to bring in a new oil well. Dave gives troublemaker Simmons a good thrashing and orders him off the site. In order to complete drilling Dave borrows $50,000 from investment banker J. T. Varley and also begins a romance with Varley's daughter Alice. Varley suffers market reverses and knowing that Dave is about to strike oil hires Simmons to wreck the rig so he can foreclose and take over.
When Brent Halston returns he finds his father in an insane asylum and Wilton about to foreclose on their ranch and bring sheep onto the cattle range. When Wilton kills a rancher, Brent is blamed and jailed. Escaping jail he gets Ware to confess that he payed to have Halston committed. He then gets unexpected help from Ethel Gordon when Wilton tries to foreclose.
The Colonel sends Fred Dawson and Doc Flanders to investigate a cattleman sheepman war. Posing as a two man medicine show, they quickly become involved. When Fred tries to bring the two sides together, Joe Allison is shot and Fred blamed. With Fred in jail and a lynch mob on the way, Doc tries to break his friend out.
Patrolman Jim Trent (Jack La Rue) hears the screams of a woman and rushes to her aid in an upstairs apartment. Inside, he is hit on the head and whiskey poured on his uniform. Gangster Louis Cantor (Mathew Betz) and his henchmen have used this ruse to get him off his beat in order to rob a warehouse. The Police Commissioner (DeWitt Jennings), knowing Trent is innocent, suggests he be dismissed from the force and get a job with the gang. At Cantor's swank gambling establishment Trent finds his girlfriend, Molly Malone (Ada Ince), who has been searching for him. With the evidence he has gathered, Trent captures Cantor and calls for the police.
Larry Baker is a young fireman whose daring exploits have led him to receiving a lot of newspaper publicity which goes to his head. His sweetheart, Mary O'Connor, and fire-department friends begin to shun him as they think he is just a publicity hound. But a daring rescue of Mary and her younger brother, Mickey, from a blazing inferno shows him to be more than just a publicity-chaser and, now, a real hero to all.
