A hopeful, funny, and untraditional love story about second chances, the ripple effects of love, and the myriad ways in which the simplest lives have the power to change the world.

The next step in Ellie Baker's marriage: divorce. She and her husband, Jonah, are heading to Florida to break it to the family. No great drama to share. After twenty years of marriage, they've just fallen out of love. Simple.

Not to their college-age daughter, Maggie, who is devastated. Or to Ellie's father, Frank, who grows as cold as a retiree can get in Orlando. As for Ellie's mother, Bunny: no, no, no. She doesn't want to hear it. After a dreadful weekend, Ellie and Jonah return home to New Jersey with hearts and minds still set on a split. Until the extraordinary morning Ellie wakes up to an alternate version of the present day--one in which she, and a passing stranger named Jonah, never married.

Over the span of an inexplicable week, Ellie sees how her world--and the world of everyone she loves--unfolded through a different course in time. And this time could change everything all over again.