Dan and Alice are both in their late 30s, both in long-term relationships, and both strangers to each other. Through no fault of their own, they find themselves traveling alone together on a long cross-country drive - the plus ones on their respective partners' invites to a wedding. As their journey progresses, Dan and Alice start to find a common ground, a similar outlook, and a shared sense that perhaps their lives aren't quite headed in the direction that once they'd dreamed of.