Ranch owner MacGregor has seven sons and oldest Gregor leads his brothers to Las Mesas, a small town where they want to sell horses. They get into trouble with local people who are related with evil Santillana. After getting imprisoned and losing their horses they decide to go after Santillana's gang.
Robert Woods
Gregor MacGregor
Fernando Sancho
Miguel
Agata Flori
Rosita Carson
Leo Anchóriz
Santillana
Manuel Zarzo
David MacGregor
Nazzareno Zamperla
Peter MacGregor
Paolo Magalotti
Kenneth MacGregor
Julio Pérez Tabernero
Mark MacGregor
