Foreword

"Come one, come all, to the Mushroom Kingdom's 1st 'Annual Lock In!' Take the ultimate bonding challenge with your friends: living together in a house, locked away from the rest of the world! There's no better way to bring you and your pals closer together!"

When Mario and his friends receive this letter, they are initially suspicious, but with Princess Peach's assurance and persuasion, she convinces everyone to take up the challenge. However, when they enter the house, things turn out not as they planned: including two unwanted guests!

Read the book to find out if Mario's gang can survive being... locked in!