Thunder Island on AllMovie

Isola Garcia (Edith Roberts) is kidnapped by a band of Mexican sheep bandits. Paul Corbin, an American (Jack O'Brien), rescues her and they fall in love. There's one problem, however -- Isola discovers that the old man she married two years prior is still alive when all this time she thought him dead. The husband has sent an agent to take Isola to Thunder Island. On the way there, the agent discovers that the husband finally has expired. Since he lusts after the pretty Isola himself, he tries to impersonate the dead husband. Isola escapes from him and hides on Corbin's ship. The agent's men give chase and the result is a free-for-all fight on board Corbin's ship. As usual, the good guys win out, and Isola and Corbin are united.