After 10 years of marriage, the once-happy lovers Xavier Rousseau and Wendy separate. When she moves with their two children, Tom and Mia, to New York City, he also moves there to be near the children. While Wendy lives with her new boyfriend John, a wealthy American, in a luxury apartment overlooking
Central Park, Xavier initially stays with his lesbian Belgian friend Isabelle (who is pregnant thanks to a sperm donation from Xavier) and her Chinese-American girlfriend Ju in their Brooklyn loft. He soon moves into Ju's former apartment in
Chinatown. Struggling to finish his latest novel about the complications of life, titled
Chinese Puzzle, Xavier is assisted by brief visions of
Arthur Schopenhauer and
Georg Wilhelm Friedrich Hegel. He regularly discusses his novel with his Paris-based editor over
Skype sessions, often lying about his progress. Staying on a tourist visa, Xavier is advised by his lawyer to seek illegal employment and
marry for a green card. After rescuing a cab driver from a road-rage incident, the grateful driver agrees to have Xavier marry his Chinese-American niece, Nancy, who is amenable and complicit. However, the immigration official interviewing Xavier and Nancy is not entirely convinced of the legitimacy of their marriage. Meanwhile, Xavier's French ex-girlfriend, Martine, visits him while on a business trip and returns a second time with her own two children on
spring break. Xavier and Martine briefly attempt to rekindle their relationship. Sometime after giving birth, Isabelle reveals to Xavier that she has been cheating on Ju with their newly hired Belgian babysitter, also named Isabelle. Although stunned by Isabelle's confession, Xavier allows her to use his apartment for a tryst with her namesake one day. Shortly afterwards, Ju calls to inform Xavier that immigration officials will conduct a surprise inspection of his apartment in half an hour, telling him to meet her there. Just before Ju arrives at the apartment, Xavier rushes over in time and urges the two Isabelles to sneak out the window. Xavier and the arriving Nancy successfully convince the immigration officials that they live together in the apartment. As Martine sets out to return to Paris with her children, Xavier races to her shuttle bus, confesses his love, and asks her to stay and live with him. She agrees, and they kiss. During a video call with Xavier, his editor criticises his finished novel's happy ending. While Martine chafes at the editor's remarks, Xavier explains that "when you find happiness, there's nothing more to say." When the editor asks if he is referring to life or the novel, Xavier and Martine simply smile. Xavier, Martine and their respective children, along with Isabelle, Ju and Nancy, happily walk in a celebratory parade down a Chinatown street. ==Cast==