Millionaire Ford selects a superb diamond necklace for his daughter Violet's birthday. Bob Collins, a suitor, is an artist and loves to sketch her face. He has a rival in Hector Loraine, who sees them together and immediately forms a deep and settled hatred for the seemingly favored artist. Collins drops his sketch book and the cunning Loraine picks it up and saves it for future reference. Violet has a horse, Arabia, that is a most intelligent equine. Hector, who is a visitor at the Ford home, is shown the necklace, and he eventually abstracts it from the family safe. Violet first forms a dislike for Hector because he is unfriendly to her horse, and that intelligent animal leads to his undoing in return. Arabia sees Hector take the jewels and when he hides it in Arabia's stall, the steed picks it up and hands it to the visiting officer and subsequently indicates the thief.