Preston and Constance Whittier have built a happy life together, with a brood of six children raised in a beautiful historic Manhattan mansion. Now, with a nearly empty nest, it's easier than ever for the Whittiers to maintain their tradition of a solo romantic "Wintermoon" ski trip. But with this year's trip comes tragedy, and suddenly the Whittier's adult children find themselves reuniting in the family home without their parents for the first time ever. The oldest, Lyle, is reaching a breaking point in his marriage and must decide whether a divorce would be best for him and his two children. Gloria's big job on Wall Street has kept her single at thirty-nine, and growing ever more cynical. The twins, Caroline and Charlie, moved out long ago to start a fashion business that may now be faltering. Benjie, with special needs, is hit hard by the loss of his parents and needs his siblings' help. And Annabelle, the youngest, drops out of college and starts to spin out of control. The eldest four are forced to put aside their personal issues and their grief to keep the family together and support each other and their two youngest siblings. Selling the house, along with all the memories that live in its walls, feels like yet another devastating loss. Could there be another way, as unconventional as it seems?