There's a dispute over water rights, and every lawman that arrives to settle the score is killed. It's up to Lash to settle the score and find out who is behind all the killings.
The first of 22 inexpensive Westerns starring Jack Randall (aka Addison Randall and Allan Byron), Riders of the Dawn is yet another in a long series of oaters featuring a lawman masquerading as an outlaw.
Steve Kinney and his henchman, Mort, are trying to stir up trouble between the local ranchers and farmers, behind a wave of rustling and lawlessness. Mort kills Vic, a Kirby cowhand, and lays the blame on Dan Harper, the leader of the farmers faction. Storekeeper Fuzzy Q. Jones, fearful of losing the outstanding charge-accounts he has on his books, drags his reluctant pal, Billy Carson, into the fray, and the two soon prove Kinney and his henchmen to be behind the valley's troubles.
While Fuzzy is waiting for his mail order bride, McCallister frames him for murder. McCallister then advises Matilda to marry Fuzzy so she will get the money when he is hung. But Billy breaks up the wedding and goes after the real killer.
Mario and Ana, in voluntary exile from Buenos Aires, live in a remote Argentine valley with their 12-year-old son Ernesto. Mario runs a school and a wool cooperative; Ana, a doctor, heads a clinic with Nelda, a progressive nun. Into this idealistic family comes Hans, a jaded Spanish geological engineer - surveying the land for the local patron, to see if it can be dammed for hydro-electric power, which would drive the peasants from the land into the cities.
Joe Weller has instigated a conflict over water rights between two ranchers. The idea is to have the ranchers do each other in then move in and take over. Hoppy and the good guys won't let this happen.
Hoppy, California and Johnny partner up with brother and sister ranch owners, two of several who are having their access to water blocked by a dam owned by a greedy merchant in town, who is intent on driving them out and taking their land for himself.
Tom Kenyon and his sidekick Pierre La Farge are hired by rancher Mike O'Day who, with his daughters Toni and Sugar, provides wild horses for the government remount station.
Tom Riley and sidekick Windy arrive at the Baker ranch where horses are being rustled. It appears the culprit is a wild horse, but Tom catches and rides the horse which leads to trouble with the real rustlers.
In the New Spain era, a tyrant ruling the San Fernando Valley attempts to wrestle a blacksmith’s daughter from the arms of her Irish sailor fiancé.