In the beginning, Phineas is invited to Princess Isabella for tacos. On the way, he finds, a strange, white star. But when he reaches the castle, a gigantafied Doof comes, steals Isabella and takes off in to the center of the universe. After a random star shooting Phineas to a galaxy, finding the way to the end, Phineas somehow gets a spaceship. Using the spaceship, he journys across the universe meeting new friends. In the end, He fights giant Doof one more time and after he wins, Isabella, the white star creature, and Phineas(or Ferb) returns to the spaceship, set for home.