La Misha wants to celebrate her birthday on Sunday, and makes some invitations to give to all her friends. When she gets to school, however, she finds out that Carla Rabbit has just passed out invitations to her birthday party, which is on Sunday too! Plus, Carla’s invitations are much prettier. The two girls begin to compete on who can hold the best party and they insist that their friends choose between them. Sunday arrives, and Misha has everything ready, but no one shows up. She rushes off to Carla’s house, thinking that her friends had gone there, but she runs into Carla along the way who says that no one appeared at her party either. It turns out that the friends organized a joint party for the two girls in the park...Misha and Carla will celebrate their birthdays together. Too bad that, in the end, a little misunderstanding puts them at odds again.