Two ex-lovers, Bill and Willa, get snowed in at a regional airport overnight. Indefinitely delayed, Willa, a magical thinker, and Bill, a catastrophic one, find themselves just as attracted to and annoyed by one another as they did decades earlier. But as they unpack the riddle of their mutual past and compare their lives to the dreams they once shared, they begin to wonder if their reunion is mere coincidence, or something more enchanted.
Mark and Mary's meet-cute happens at a neighborhood drug store, where she is busy buying a pregnancy test, and he has to make an effort to remind her they met in college. After asking her out, he accompanies her as she takes the test, and upon it showing negative, she agrees to a date. One year later, they have fallen deeply, passionately, head over heels in love, and their whirlwind romance leads to marriage. So when Mary suddenly requests they open their relationship to “ethical non-monogamy”, Mark is taken by surprise, but agrees to try it. And that's where this story really begins.
Following the launch of her new novel, 35-year-old writer Kate Conklin is invited to speak at her alma mater by her mentor and former professor. After accepting the invitation, Kate finds herself deeply enmeshed in the lives of an eccentric group of college students.