Rambunctious Tess is always acting like a dog and older sister Abby can't stand it anymore. But disaster really hits when they team up to look after two adorable goldfish. In the end, Abby saves the day and Tess saves Abby. The award-winning "Abby & Tess Pet-Sitters" series features Abby, an aspiring veterinarian who desperately wants a pet but lives in a "no pets allowed" apartment building, and her younger sister, Tess. The girls go into the pet-sitting business and discover new things about animals and new ways to solve problems.