Human Passions (1919)

Alerted to his wife's infidelity by his closest friend, Duncan Shields, Texas rancher Frank Warren shoots the lover and leaves. Sixteen years later, Warren, living in an old castle in Cuba, sends his secretary Fernwald to take his daughter Lola from his wife's influence. Lola and Shield's son, Duncan, Jr., have fallen in love, but when Fernwald arrives, Duncan mistakenly believes that Lola's warm greeting is symptomatic of a promiscuity that characterized her mother. He is saved from suicide by sailors and becomes a member of their crew. Aboard the ship to Cuba, Duncan rescues Lola from Fernwald's attempted rape. After Fernwald steals her papers, goes ashore, and watches as the boat bursts into flames and sinks, Lola and Duncan drift to an island. Meanwhile, Fernwald has his old sweetheart impersonate Lola to gain her inheritance. After Lola and Duncan are rescued and survive a wash-out on a mountain road, they are taken to the castle, where Fernwald attempts to poison Duncan. They struggle, Duncan pushes Fernwald over a ledge, Lola and her father are reunited, and Lola and Duncan embrace.