Londoner Charlotte Cheshire and Brooklynite Anthony Monteleone are both having a blue Christmas: both dumped by their exes, both stranded at New York's John F. Kennedy airport, and both desperate for something to take their minds off the holiday. After their chance meeting and realization that they are in a similar predicament, Charlotte suggests traveling into the city for an adventure, following the steps in a silly self-help book she has about getting over a broken heart, but Anthony thinks she must be nuts! However, anything is better than spending Christmas Eve alone.

Poppy and Alex. Alex and Poppy. They have nothing in common. She’s a wild child; he wears khakis. She has insatiable wanderlust; he prefers to stay home with a book. And somehow, ever since a fateful car share home from college many years ago, they are the very best of friends. For most of the year they live far apart—she’s in New York City, and he’s in their small hometown—but every summer, for a decade, they have taken one glorious week of vacation together.

It’s 2 AM on a Saturday night in the spring of 2001, and 28-year-old Cecily Gardner sits alone in a dive bar in New York’s East Village, questioning her life. Feeling lonesome and homesick for the Midwest, she wonders if she’ll ever make it as a reporter in the big city - and whether she made a terrible mistake in breaking up with her longtime boyfriend, Matthew.

Natasha: I’m a girl who believes in science and facts. Not fate. Not destiny. Or dreams that will never come true. I’m definitely not the kind of girl who meets a cute boy on a crowded New York City street and falls in love with him. Not when my family is 12 hours away from being deported to Jamaica. Falling in love with him won’t be my story. Daniel: I’ve always been the good son, the good student, living up to my parents’ high expectations. Never the poet. Or the dreamer. But when I see her, I forget about all that.

Arthur is only in New York for the summer, but if Broadway has taught him anything, it’s that the universe can deliver a showstopping romance when you least expect it. Ben thinks the universe needs to mind its business. If the universe had his back, he wouldn’t be on his way to the post office carrying a box of his ex-boyfriend’s things. But when Arthur and Ben meet-cute at the post office, what exactly does the universe have in store for them? Maybe nothing. After all, they get separated. Maybe everything. After all, they get reunited.

Holly has a plan for everything. But she never could have planned for this. Holly Murphy’s perfectly planned life is not going so well. Her fiancé recently dumped her, the team she supervises at work secretly hates her, and now the promotion she’s worked so hard for is in jeopardy. Thinking that maybe Holly is too tightly wound and needs a break from everything, Holly’s boss demands she take a vacation.

Anna is looking forward to her senior year in Atlanta, where she has a great job, a loyal best friend, and a crush on the verge of becoming more. Which is why she is less than thrilled about being shipped off to boarding school in Paris - until she meets Etienne St. Clair: Perfect, Parisian (and English and American, which makes for a swoon-worthy accent), and utterly irresistible. The only problem is that he's taken, and Anna might be, too, if anything comes of her almost-relationship back home.

Mark and Kate have sat next to each other for an entire year but have never spoken. For whatever reason, their paths outside of class have never crossed. That is until Kate spots Mark miles away from home, out in the city for a wild, unexpected night. Kate is lost, having just run away from a chance to finally meet the girl she has been in love with from afar. Mark, meanwhile, is in love with his best friend, Ryan, who may or may not feel the same way.

Kara Sullivan’s life is full of love - albeit fictional. As a best-selling romance novelist and influential bookstagrammer, she’s fine with getting her happily-ever-after fix between the covers of a book.

Marty arrives in London with nothing but his oboe and some savings from his summer job, but he's excited to start his new life - where he's no longer the closeted, shy kid who slips under the radar and is free to explore his sexuality without his parents' disapproval. From the outside, Marty's life looks like a perfect fantasy: In the span of a few weeks, he's made new friends, he's getting closer with his first-ever boyfriend, and he's even traveling around Europe. But Marty knows he can't keep up the façade.

Kat and Stevie - best friends, theater kids, polar opposites - have snuck away from the suburbs to spend a night in New York City. They have it all planned out. They’ll see a play, eat at the city’s hottest restaurant, and have the best. Night. Ever. What could go wrong? Well. Kind of a lot? They’re barely off the train before they’re dealing with destroyed phones, family drama, and unexpected Pomeranians. Over the next few hours, they’ll have to grapple with old flames, terrible theater, and unhelpful cab drivers. But there are also cute boys to kiss, parties to crash....

If Bao Nguyen had to describe himself, he’d say he was a rock. Steady and strong, but not particularly interesting. His grades are average, his social status unremarkable. He works at his parents’ pho restaurant, and even there, he is his parents’ fifth favorite employee. Not ideal. If Linh Mai had to describe herself, she’d say she was a firecracker. The only problem? Her parents rely on her in ways they’re not willing to admit, including working practically full-time at her family’s pho restaurant.

Sixteen-year-old Alice is spending the summer in Paris, but she isn't there for pastries and walks along the Seine. When her grandmother passed away two months ago, she left Alice an apartment in France that no one knew existed. An apartment that has been locked for more than 70 years. Alice is determined to find out why the apartment was abandoned and why her grandmother never once mentioned the family she left behind when she moved to America after World War II. With the help of Paul, a charming Parisian student, she sets out to uncover the truth.

Wren’s closest friend, her anchor since childhood, is dead. Stewart Beasley. Gone. She can’t quite believe it, and she definitely can’t bring herself to google what causes an aneurysm. Instead of weeping or facing reality, Wren has been dreaming up the perfect funeral plans, memorial buffets, and processional songs for everyone from the corner bodega owner to her parents (none of whom show signs of imminent demise).

Meg Mackworth's hand-lettering skill has made her famous as the Planner of Park Slope, designing custom journals for her New York City clientele. She has another skill too: reading signs that other people miss. Knowing the upcoming marriage of Reid Sutherland and his fiancee was doomed to fail is one thing, but weaving a secret word of warning into their wedding program is another. Meg may have thought no one would spot it, but she hadn't counted on sharp-eyed, pattern-obsessed Reid. A year later, Reid tracks Meg down to find out how she knew that his future was about to implode.