An exceptionally small dog is born onto a peaceful farm owned by a farmer/sport's lover named Innis. Innis grows an attachment to the runt of the Chihuahua litter because of her tough attitude. He names her Sosa, after the baseball player, Sammy Sosa, because she loves to watch Sammy play ball on TV. When Innis is forced to give up his new friend, Sosa is sent off to a pet store. The harsh conditions of small spaces and a mean owner make her days in the shop grueling. However, a dream owner named Vinny rescues her and returns her, temporarily, to the joyous lifestyle she missed. The problem now, is that Vinny's girlfriend; Patty is a self-absorbed dog hater. When Vinny finally finds a true love, Patty is out for revenge. Sosa is abducted and Vinny and his new girlfriend, Jessica, fight to get her back. The happy reunion brings relief, but long days filled with work make Vinny and Jessica forget the importance of love and family.