When you're a monster, spending the night in a haunted mansion should be easy. Unfortunately, no one told that to the ghosts.

When one of the monsters' pets goes missing, they all must lend a hand, or a paw, or a claw.

The Mighty Mighty Monsters are going on a field trip to the museum in the city. Like most of their outings, things get a little crazy. They meet a mummy who comes to life. Using their 'Monster Might,' they help him break out of the museum and take him back to Transylmania.

After a bag mix up earlier in the day, Vlad and the monster gang become part of a crazy art heist. They've found the thugs who stole the art from the museum, but now they must find a way to save themselves!

The monsters are enjoying a day at the annual scare fair when Milton runs into trouble. Cursed with bad luck, he breaks all the mirrors in the infamous hall of mirrors. The scare fair is already having money trouble, and Milton must find a way to replace the mirrors and make the fair popular again.