Carlos feels unappreciated. No one wants to help him do his chores except Rubik, who gets a little carried away and mostly makes things worse. So Carlos decides to run away. He and Rubik take off in the middle of the night, followed by Reynaldo and Lisa, who are determined to get them to come home. In the train yard (which is the first place all kids seem to go when they run away) Carlos and Rubik run into a mysterious man who turns out to be Rubik's old master. He is bent on getting the cube back and once again making Rubik his slave. Suddenly Carlos is no longer running away, but has joined his brother and sister in a rescue effort. They have to get Rubik back before the evil carnival magician has a chance to use Rubik's powers against them.