Sick of having to share everything, Maya and Miguel opt to have separate birthday parties. Rosa and Santiago are taken aback at first, but agree to help each one plan the party of their dreams. Eager to attract more people to their parties, Maya and Miguel begin a game of one-upmanship, which culminates in them accidentally planning their parties at exactly the same time. Now all the guests must race back and forth between the two parties to catch the highlights. As the guests get more and more worn out, Maya and Miguel start to feel something's missing from their parties. They come to realize that the best thing is missing from both of their parties: each other.