Harry Potter and the Philosopher's Stone is a fantasy novel written by British author J. K. Rowling. The first novel in the Harry Potter series and Rowling's debut novel, it follows Harry Potter, a young wizard who discovers his magical heritage on his eleventh birthday, when he receives a letter of acceptance to Hogwarts School of Witchcraft and Wizardry. Harry makes close friends and a few enemies during his first year at the school, and with the help of his friends, Harry faces an attempted comeback by the dark wizard Lord Voldemort, who killed Harry's parents, but failed to kill Harry when he was just 15 months old.

The plot follows Harry's second year at Hogwarts School of Witchcraft and Wizardry, during which a series of messages on the walls of the school's corridors warn that the "Chamber of Secrets" has been opened and that the "heir of Slytherin" would kill all pupils who do not come from all-magical families. These threats are found after attacks that leave residents of the school petrified. Throughout the year, Harry and his friends Ron and Hermione investigate the attacks.

On New Year's Eve, Cal is chased down the street by a crazed man with a deadly warning: They killed your father. They'll kill you. You must survive the next 365 days! Forced into a life on the run, Cal finds himself hunted by ruthless criminals and the police. Somehow he must uncover the truth about his father's mysterious death and solve the Ormond Singularity, a secret from the past, before the year is up. But who can he turn to when the whole world seems to want him dead? The clock is ticking. Any second could be his last. Callum Ormond has been warned. He has 365 days. The countdown has begun ...