But, not long after setting off, a car slams into the back of theirs. The driver is none other than Addie's ex, Dylan, who she's avoided since their traumatic break-up two years earlier.Dylan and his best mate are heading to the wedding too, and they've totalled their car, so Addie has no choice but to offer them a ride. The car is soon jam-packed full of luggage and secrets, and with four-hundred miles ahead of them, Dylan and Addie can't avoid confronting the very messy history of their relationship...