Michael Munroe is learning a few new lessons in school this week: Never trust a teacher who believes in monsters. Don't even think about entering her house. And stay away from the giant egg in her attic - especially if it's about to hatch.What could be worse than a monster egg? An entire theme park filled with monsters! But that's not the only surprise. Soon, Michael and his friends will discover shocking new secrets about HorrorLand theme park.