Life is unfolding as planned for Myra & Matt Sack until their year-old daughter Havi is diagnosed with Tay-Sachs, a fatal neurodegenerative disease, and given only a year to live. They decide to celebrate Havi’s short life and vow to show her as much of the world as they can, surrounded by loved ones who relocate to be in Havi’s orbit. Tapping their Judaism, they transform Friday night Shabbats into birthday parties—“Shabbirthdays”—to replace the birthdays Havi will never have.