Leaving Brazilian Wizarding school Castelobruxo after her mother takes a position at Hogwarts, Atari Velasquez trades her emerald uniform for the scarlet of Gryffindor. Her new home, now a castle, not a temple, instantly becomes a place of wonder and excitement. One of those excitements is Bill Weasley; a prefect in the same year. Popular, cool, kind and unlike anyone Atari has ever met before, she takes to him as quickly as she takes to her new school. Falling for Bill and fascinated by the Merpeople of the Great Lake, Atari almost fails to notice that her mother and Slytherin-bound older sisters are up to something. When they take an unusual interest in her love life and become obsessed with the concept of Soul magic, the real reason they came to Hogwarts starts to become clear. A darker side to the Velasquez family begins to show, their plan one of evil makings. Knowing that it involves both her and Bill and whatever is between them, the two set off on a quest to find the answer within Hogwarts before it's too late.