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While on a "slumming" excursion, debutante Bobbie Walsh (Viola Dana) falls in love with tenement-district doctor Thornton (Allan Simpson). Not wishing to scare the doctor off, Bobbie doesn't tell him that she's the wealthy daughter of a prominent senator. But when Dr. Thornton ends up in night court after punching out a pair of would-be mashers, Bobbie is forced to reveal her true identity. The expected resentments arise, leading to the inevitable reconciliation. One Splendid Hour was one of the few films released by Excellent Pictures that truly lived up to the studio's name.