Heart of a Siren on AllMovie

Barbara La Marr vamps her way through this drama, which was based on the William Hurlbut play Hail and Farewell. Isabella Echevaria (La Marr) is an infamous seductress who is known throughout Europe. When she arrives at a fashionable French hotel, she encounters many of her cast-off lovers, one of whom shoots himself at her feet. None of this matters to her -- she's after Gerald Rexford (Conway Tearle), who has been cold to her in the past. She is determined to get revenge by making him fall in love with her. She uses every artifice to get his attention -- and when he finally does fall in love with her, she finds that she, too, loves him back. Rexford's disapproving mother convinces Isabella that she must break off the relationship. When Rexford's engagement to another woman is announced, Isabella decides to swallow poison. Rexford, who discovers his mother's meddling, rushes to Isabella. Luckily, her valet (Clifton Webb) has switched bottles on her, so Isabella hasn't really poisoned herself after all, and the couple are reunited.