It's December twenty-second and siblings Henry, Kate, and Martin have converged with their spouses on Henry's house in upstate New York. This is the first Christmas the siblings are without their mother, the first not at their mother's Florida house. Over the course of the next three days, old resentments and instabilities arise as the siblings, with a gaggle of children afoot, attempt to perform familiar rituals, while also trying to decide what to do with their mother's house, their sole inheritance. As tensions rise, the whole group is forced to come together unexpectedly when a local mother and daughter need help.