10 years after being left on the doorstep of the Dursleys, Harry Potter, now nearly 11, is living a loving life with the Dursleys—his aunt and uncle Vernon and cousin Dudley. They are celebrating his eleventh birthday when Marge Dursley, Dudley's aunt and Vernon's sister who despises Harry, arrives to take Dudley and his friend Piers Polkiss to the zoo. At the zoo, a boa constrictor interacts with Harry, much to the rest of the Dursleys' confusion. Marge leaves furious at the Dursleys for "taking what is Dudley's".
