Gregor MacGregor (David Bailey) is celebrating his upcoming marriage to Rosita Carson (Agata Flori) when bandits, led by the evil Maldonado (Leo Anchóriz), steal the family fortune. Determined to get their money back, Gregor and his six brothers go after the robbers. They run across a dentist and his beautiful daughter, who help them find the gang's hideout and retrieve their cash -- but then Maldonado takes Rosita hostage in retaliation. When Gregor comes to save her, he is also captured.