Someone is poisoning people in Ystad, but Magnus struggles to figure it all out. Could the arrival of the new detective Alexandra Olsson of Scotland Yard help him work out who is killing these people? Or will her arrival only distract him further?

Wallis Bell leaves home to start her fifth year at Hogwarts School of Witchcraft and Wizardry with her small group of friends. But as she befriends a particular troublesome twin, her quite life at Hogwarts turns into a fast paced, mischievous mixture of books, boys and brand new experiences. With the help of her new friends, Wallis' last few years at Hogwarts will not be forgotten.