I really liked this book! I read another by O'Leary earlier this month and liked it well enough, so when I saw this one was available I requested it, and I'm glad I did! Addie and her sister Deb are road tripping to their friend's wedding in Scotland and giving a ride to Rodney, a random who said they needed a lift in the wedding guests group message. They leave early in the morning but are soon rear ended by Dylan, Addie's ex, and his annoying best friend Marcus. With one car needing serious repair, they realize they won't make it to the wedding in time using public transit so they all pile into Deb's mini and start the most awkward two day trip ever. Addie and Dylan both tell the story and we get current day plus glimpses into their past to find out what happened between them.