It has been nine years since we last met Jesse and Celine, the French-American couple who once met on a train in Vienna. They now live in Paris with twin daughters, but have spent a summer in Greece on the invitation of an author colleague of Jesse's. When the vacation is over and Jesse must send his teenage son off to the States, he begins to question his life decisions, and his relationship with Celine is at risk.

Early thirty-something American Jesse Wallace is in a Paris bookstore, the last stop on a tour to promote his best selling book, This Time. Although he is vague to reporters about the source material for the book, it is about his chance encounter nine years earlier on June 15-16, 1994 with a Parisienne named Celine, and the memorable and romantic day and evening they spent together in Vienna. At the end of their encounter at the Vienna train station, which is also how the book ends, they, not providing contact information to the other, vowed to meet each other again in exactly six months at that very spot. As the media scrum at the bookstore nears its conclusion, Jesse spots Celine in the crowd, she who only found out about the book when she earlier saw his photograph promoting this public appearance. Much like their previous encounter, Jesse and Celine, who is now an environmental activist, decide to spend time together until he is supposed to catch his flight back to New York, this time only being about an hour. Beyond the issue of the six month meeting, what has happened in their lives in the intervening nine years, and their current lives, they once again talk about their philosophies of life and love, this time with the knowledge of their day together and how it shaped what has happened to them.

American tourist Jesse and French student Celine meet by chance on the train from Budapest to Vienna. Sensing that they are developing a connection, Jesse asks Celine to spend the day with him in Vienna, and she agrees. So they pass the time before his scheduled flight the next morning together. How do two perfect strangers connect so intimately over the course of a single day? What is that special thing that bonds two people so strongly? As their bond turns to love, what will happen to them the next morning when Jesse flies away?

Smart-but-ineffectual journalist Dan "We use euphemisms!" cannot decide between his girlfriend, loving-but-clingy waitress Alice, or his lover cold-but-intellectual photographer Anna; herself indecisive between Dan and honest-but-thuggish "You're bloody gorgeous!" doctor Larry. The film puts the four leading characters in a box and strips them apart.

Sutter Keely lives in the now. It's a good place for him. A high school senior, charming and self-possessed, he's the life of the party, loves his job at a men's clothing store, and has no plans for the future. A budding alcoholic, he's never far from his supersized, whiskey-fortified thirst-master cup. But after being dumped by his girlfriend, Sutter gets drunk and wakes up on a lawn with Aimee Finecky hovering over him. She's different: the "nice girl" who reads science fiction and doesn't have a boyfriend. While Aimee has dreams of a future, Sutter lives in the impressive delusion of a spectacular now, yet somehow, they're drawn together.

Anna and Jacob fall instantly in love when they meet as students at an L.A. university. But Anna is British and when graduation approaches, Anna decides to stay and violate her student visa rather than returning to England. After a visit home, she is then unable to return to the United States. While fighting customs and immigration battles, Anna and Jacob must decide if their relationship is worth the distance and the hardship.

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