Forty-five? And falls in love? Lally Marlett laughs off the thought that her middle-aged father could still feel the flame of romance ' until he runs off with another woman. Shocked and embittered, Lally accompanies her mother on a vacation in an attempt to put the past behind them. But the past catches up when she falls for a polished charmer who, unknown to her, is the son of her father's paramour. Norma Shearer and Robert Montgomery headline Their Own Desire, scripted by woman's-picture screenwriter extraordinaire Frances Marion (Dinner at Eight, Camille). Marion shows her skill at heartbreak by packing star-crossed love, infidelity and two near-death experiences into a brisk 64 minutes of romantic melodrama.