Maya is a freelance attorney who, after a minor setback, has been living in the apartment above her parents' garage and using the Casillas Panadería as her unofficial office for the past couple of years. The Mexican bakery has held a warm spot in her heart ever since she worked there as a teenager alongside her high school crush, Alejandro "Alex" Casillas, the handsome nephew of the owner. When Alex's uncle asks for Maya's help in selling the bakery, Alex decides to return home to celebrate one last Christmas in the bakery and help Maya find a buyer for the bakery, whether or not she actually wants his help.
Settie Rose, an eccentric matriarch, hires struggling novelist Juan to write her holiday contest entry. A mixup sparks gossip of Juan's engagement to Settie's daughter Lily, leading the family to play along humorously.
Inspired by Mickey Guyton’s song of the same name, Heaven Down Here tells the story of four disparate people who find themselves stranded in a local diner on Christmas Eve when a snowstorm hits the town. Imami (Brown) is a widowed mother of two who’s having trouble making ends meet and reluctantly agrees to work the Christmas Eve shift, where she clashes with her boss Dan (Harmon), who doesn’t exactly embody the Christmas spirit. Felix (Riedinger) is a local pastor desperately trying to secure food for parishioners while his faith is challenged by his alienation by his son. Clara (Lifford) is a hospice nurse with an obstinate patient (Rashad) and whose daughter is moving away, causing her to question her place in this world. Throughout the evening, these four bicker, bond and unwittingly provide each other with the answer to their respective prayers.