Hannah and Si are in love and on the same track - that is, until their train divides on the way to a wedding. The next morning, Hannah wakes up in Paris and realises that her boyfriend is 300 miles away in Amsterdam! When Hannah meets Léo on the station platform, and spends the day with him in Paris, she question how well she really knows herself - and whether, sometimes, you need to go in the wrong direction to find everything you've been looking for.