A guy comes from under the bed and takes the kid to an under world. He has a broken horn

A young boy is scared of the monster under his bed. He asks his 6th grade brother to swap rooms for the night as a bet that the monster really exists. Soon the brother becomes friends with the monster and discovers a whole new world of fun and games under his bed where pulling pranks on kids and other monsters is the main attraction.

A washed-up musician teams up with a teacher and a kids show personality to protect young children from a sudden outbreak of zombies.