The Harry Potter movies (and the books they're based on) all follow the same basic name formula. Each one of them is called Harry Potter and the Something Weird and Mysterious You Won't Understand Until You Start Watching the Movie.
Harry Potter and the Chamber of Secrets is no different.
We're almost forty-five minutes into the movie when the mysterious callout from the title finally comes up. Harry is roaming the halls of Hogwarts and he sees a message written on the wall in blood—"The Chamber of Secrets has been opened. Enemies of the Heir, beware." What is this secret chamber? Who is the heir? Oh, how will this mystery be solved?
The whole thing draws you in and makes you want to keep watching. You're definitely not leaving the theater now…no matter how bad you have to go to the bathroom.