Blanche Sweet plays Molla Hansen, the daughter of the captain of an oil schooner (Bert Sprotte). Molla has made plans to marry Captain Rodney O'Malley (Robert Frazer) when she returns from a voyage with her father, but the ship burns at sea. She is saved by a lighthouse keeper named Silas Martin (Russell Simpson), who dies from his wounds, and in gratitude, she cares for the man's daughter, Pearl (Dorothy Sebastian). O'Malley, who believes Molla to be dead, goes on a two-year voyage. Charley Watts (Alan Roscoe), a rum-runner, seduces Pearl, who tries to blame her pregnancy on an innocent man – Ira Meers (Edward Earle). Shockingly she learns that Watts is married, and she turns on the gas in the lighthouse, and locks him in the lighthouse tower, fills it with gas, and hurls a lighted lantern at him. Pearl and Watts are killed, but Ira recovers. The explosion signals Rod's ship, and he and Molla are reunited.This 1925 melodrama of the sea, was based on the play "The Sea Woman," by Willard Robertson. Starring Blanche Sweet, it was a Edwin Carewe Productions and distributed by First National Pictures. Sadly, Why Women Love now remains a lost silent film.