Slowly, life is getting back to normal. Molly has just said I love you to her new boyfriend, Ian, and they are off on a romantic European vacation together, starting with scenic London. But there on a tube platform, the past catches up to her in the form of Gabe, her ex, traveling on his own parallel vacation with new girlfriend Sadie.
After comparing itineraries, Ian ends up extending an invite for Gabe and Sadie to join them on the next leg of their trip to Ireland. Sadie, who’s dying to go there, jumps at the prospect. And Molly and Gabe can’t bring themselves to tell the truth about who they once were to each other to their new significant others.
Now Molly has to spend 9 Days and 9 Nights with the boy she once loved, the boy whose heart she shredded, without Ian knowing. Will she make it through as new improved Molly, or will everything that happened between her and Gabe come rushing back?