Two Chinese families, the Lings and the Wongs, are involved in a long-time feud. The daughter of one loves the son of the other. They become engaged, with a valuable jade necklace to be presented to the couple to seal the new union between the families. Reporters Ann Parker and Bob Martin travel to Chinatown to cover the wedding, but when the jade necklace is stolen, the feud begins once again. The two reporters investigate, but police dog Tarzan finds the vital clue that leads to the real jewel thieves. Tarzan helps chase and capture the villains, the necklace is restored to their rightful owners, and peace between the two families is restored just in time for the wedding.