Emma Swan thought that falling for a guy, at first sight, was impossible, until one day she met Killian Jones aboard a train. The strong and unexpected connection they both feel will lead them to experience love as they never had before. During the way, they will have to face a wave of obstacles that will stand between their happiness, including a past situation in Emma's life. Will they be capable to overcome them? Or will they break them apart? A story of passion with a small pinch of mystery based on the Once Upon A Time characters.