Hadley misses her flight to London. While waiting for the next flight, she meets Oliver, who is also heading to London. They happen to sit next to each other on the plane, and during the journey, a connection forms between them. However, when they go through passport control, they are separated without having exchanged contact information. Both of them, on their own, start searching for each other in London without much to go on.
A very good romantic story that also touches on emotions following parents' divorce and cancer. It feels fairly genuine even though it's, of course, a romantic saga. I especially liked the approach with a narrator who is also involved in the scenes.