Looking up at the skyscraper in Boston, Kat is feeling both nervous and excited. She is about to step into the office of her ex-boyfriend Nate, where they’ll be working together. Five years ago, when he asked her to choose between work and their relationship, Kat said goodbye to Nate. Kat wonders whether he still remembers their amazing days together. But this sweet moment of nostalgia doesn’t last long. When she enters the office, Nate’s cold eyes tell her everything she needs to know—what’s between them is just business…