The document discusses how the Harry Potter story would have been different if Severus Snape and Lily Evans had not grown up in the same town. It outlines 26 ways the plot would have changed, including that Snape would not have loved Lily, betrayed the Potters, or been able to protect Harry at several points in the books. His role as a double agent and many of his actions that helped Harry would not have happened if he and Lily were not childhood friends.