Many years after a catastrophic event has decimated society, humanity is on the verge of extinction. The last few people continue on in search of life, struggling to survive as they confront their mortality and purpose in this dying world.

When Joan’s son’s wedding planner unexpectedly quits, she must coordinate his Christmas Eve wedding with the help of Beau, the bride’s uncle. As they work alongside each other they discover their fates and pasts are intertwined.