When trying to celebrate the wedding anniversary of Astronov & Neptunia, Cosmo divorces Wanda and leaves her with Poof due to a misunderstanding, and Neptunia divorces Astronov after arguing with him not too long afterwards. Soon after, Neptunia falls in love with Cosmo, they both get together and go to Cosmo's mother, Mama Cosma, who despises Wanda after she "stole" Cosmo from her, but takes a liking towards Neptunia. Meanwhile, Astronov gets together with Wanda, whom he had a crush on in high school, and they both go to Wanda's father, Big Daddy, who despises Cosmo, but approves Astronov. Things start to go downhill when Cosmo and Wanda, while they have no problem getting used to their new loves and enjoy it at first, they slowly start missing each other, which forces both Timmy and Ivan to go to Fairy World to get things right. In order to win back the respect of their spouses, Cosmo, Neptunia, Wanda and Astronov must compete on a Fairy World game show hosted by the God of Love himself, Cupid.