Harry Potter, who has been away from the wizarding world for many years, has lived a life of poverty, but now he has been declared a wizard by the Ministry of Magic. That was raising a slave - a member of the Death Eaters on the losing side in the Wizarding World War - and Harry's former enemy, Draco Malfoy.
What worries Harry right now is not only how to get along with his slave, but also how to feed such a big living person...