i’m assuming you are talking about harry potter and the sorcerers stone
In the book, Harry and Hermione were caught out of bed by Filch, the caretaker of Hogwarts, while they were investigating the restricted section of the library in order to learn more about the Philosopher's Stone. As punishment, they were given detention by Professor McGonagall, the deputy headmistress of Hogwarts, and lost house points for Gryffindor.