Molly lives by the beach, and misbehaves all the time. There's a reason why she acts up. It's the monsters of Monster Land! The monsters are free to act and do as they please and that's what Molly wants to do as well. For awhile...
In her day to day life, she is restless and finds everything boring. Believing that she is part monster, she decides that she would fit in better in Monster Land, a land for monsters beyond the tallest dune. Her dog Jojo knows the way to the entrance, and leads her there.
Once inside, she visits with all her monster friends, including a mud dog monster, a gossip monster and a crabby bird. The sun and the moon help her out now and then, as she decides on whether she wants to stay or not.