While watching Crash Nebula, Timmy wishes for an alien to play with. So, Cosmo and Wanda take a real alien prince - Mark. His parents are furious and travel to Earth to blow it up. In the meantime, Mark has fallen in love with Vicky, and Timmy can't wish him away because GodParents can't interfere with true love. Timmy goes to Mark's parents and asks them to convince their son to forget about Vicky, but Timmy must first pass their toughest tests. Will he be able to fix this mess and save the Earth from destruction?