Addie and her sister are on an epic road trip to a friend's wedding in rural Scotland. But, not long after setting off, a car slams into theirs. The driver is none other than Addie's ex, who she hasn't seen since their traumatic break-up two years earlier.

Dylan and his best mate are heading to the wedding too, so Addie has no choice but to offer them a ride. And with four hundred miles to go, they can't avoid confronting the very messy history of their relationship...

Will they make it to the wedding? And, more importantly, is this really the end of the road for Addie and Dylan?