Eleven-year-old Otto wants a dog. His twelve-year-old perfect sister Lexi wants a cat. Their mother - who works very long hours as a nurse - wants neither. Otto has an idea. What if he got a job and earned enough money to pay for the dog? Then Lexi proposes that whichever sibling can raise enough money first will decide which pet they get. Oddly enough, their mom and dad agree. With Otto and Lexi each out to defeat the other, their business plans become more elaborate and involved. As the competition gets fiercer, the stakes get higher and the battle lines have been drawn. So let the Pet War begin...