Jack, now broken up with Sarah, moves to Edinburgh for a job opportunity while Oscar accepts a promotion that keeps him in Brussels three days a week, leaving Laurie, who has yet to repair her relationship with Sarah, alone and isolated. Jack realizes this, too, and he steps in to deliver a speech and save the moment, leading many to suspect that he has feelings for Laurie. When it is time for speeches, Laurie suddenly realizes that Sarah is not there to give her toast as maid of honor. Sarah, angry that Laurie has kept the secret all this time, does not come to the wedding. Just before the wedding, Laurie admits to Sarah that Jack is the man from the bus stop. She and Oscar begin a relationship that continues when the two return to England, and they later get married.

Racked with guilt and in need of a change, Laurie leaves to travel in Thailand, where she meets Oscar, a young banker from London. In one encounter, she alludes to the first time they met, referring to the bus stop although Jack knows she is the woman from the bus stop, he feigns ignorance, avoiding a moment of recognition. Laurie keeps her feelings for Jack a secret, but as the years go by, she develops her own deep friendship with Jack. One day, Laurie meets him again: Unbeknownst to Sarah, Sarah’s new boyfriend is none other than Jack O’Mara, the man from the bust stop. She and her best friend Sarah hunt for him to no avail. The bus drives away, and Laurie spends the greater part of a year obsessed with finding the mystery man. Their eyes meet, and they have an instant connection-love at first sight. One day, Laurie spots a man from inside her city bus.

Laurie lives with her best friend, worries about the distance between her and her family, is looking for love, and is trying to leave her temporary hotel receptionist job for her dream job in magazine publishing. One Day in December follows Laurie James as she makes her way through her twenties in contemporary London.

One day in december josie silver movie