While stuck at a wedding in Palm Springs, Nyles meets Sarah, the maid of honor and black sheep of her family. After he rescues her from a disastrous toast, Sarah becomes drawn to Nyles and his offbeat pessimism. But when their impromptu encounter is thwarted by a surreal interruption, Sarah must join Nyles in embracing the idea that nothing really matters, and they begin wreaking spirited chaos on the wedding celebration.