New York City is full of lonely hearts seeking the right match, and what Alice, Robin, Lucy, Meg, Tom and David all have in common is the need to learn how to be single in a world filled with ever-evolving definitions of love.

On the set of a playwright's new project, a love triangle forms between his wife, her ex-lover, and the call girl-turned-actress cast in the production.

An aspiring music journalist lands her dream job and is about to move to San Francisco when her boyfriend of nine years decides to call it quits. To nurse her broken heart, she and her two best friends spend one outrageous last adventure in New York City.

Veronica is a white-bread beauty searching for a good man in Los Angeles. While slam dancing at a Halloween rave, she meets Abel, a sensitive poet. Then she meets Zed, a supersexy tattooed drummer with incredible biceps. Who will she choose? Does she go for true love or cheap sex? She can't decide so she chooses both. But after managing to nurture a picture-perfect threesome, along comes Ernest, a rich movie director with deep baby blues that sweep Veronica off her feet. What's a girl to do now?

Best friends since they were kids, Rabbi Jacob Schram and Father Brian Finn are dynamic and popular young men living and working on New York's Upper West Side. When Anna Reilly, once their childhood friend and now grown into a beautiful corporate executive, suddenly returns to the city, she reenters Jake and Brian's lives and hearts with a vengeance. Sparks fly and an unusual and complicated love triangle ensues.

A writer for a greeting card company learns the true meaning of loneliness when he comes home to find his girlfriend in bed with another man.

Ironworker Nick lives with his wife, Kitty, and three daughters. When he meets a significantly younger woman, Tula, he starts an affair with her, much to the chagrin of his wife, and his life is thrown into upheaval. Kitty kicks Nick out of the house, and he is forced to make some difficult decisions.

Lu, a conformist woman in her forties, learns that her 15-year partner has been having extramarital affairs. Starting from scratch, she gets involved in an unexpected relationship with a young womanizer.

Book superstore magnate Joe Fox and independent book shop owner Kathleen Kelly fall in love in the anonymity of the Internet—both blissfully unaware that he's trying to put her out of business.

Playboy Thomas Fuentes has so far been able to skate by in life on good looks and charm alone. But when his duplicitous relationships with three women -- impassioned waitress Cici, meticulous lawyer Lorena and bored socialite Patricia -- spiral out of control, he suffers a mental breakdown. His doctor recommends that he choose just one girlfriend -- but can he choose in time before they discover his deception?

A guy has his life planned out until he is wooed, groomed and then dumped by an elusive woman.

A high-strung news producer finds herself in a love triangle between a talented but self-doubting reporter and a charming news anchor who embodies the growing trivialization of news that she is determined to fight against.

The bonds between Naomi and Ely are tested when they fall for the same guy.

Jane Goodale has everything going for her. She's a producer on a popular daytime talk show, and is in a hot romance with the show's dashing executive producer Ray. But when the relationship goes terribly awry, Jane begins an extensive study of the male animal, including her womanizing roommate Eddie. Jane puts her studies and romantic misadventure to use as a pseudonymous sex columnist -- and becomes a sensation.

When TV producer Leah Caldwell aims to become the first woman running New York's top morning show, her ex competes for the same role. Leah stays focused on her career, until chemistry with her ex challenges her priorities.

Lara Jean and Peter have just taken their romance from pretend to officially real when another recipient of one of her love letters enters the picture.

When best friends and total opposites Debbie and Peter swap homes for a week, they get a peek into each other's lives that could open the door to love.

When a happily married family man, who would never consider an affair, meets a beautiful woman in red, he is totally infatuated and desperate to make her acquaintance. However, as he tries out various schemes to sneak out to meet her, he realizes that adultery is not quite as easy as it looks.

Archie has been in love with his best friend Amelia for as long as he can remember. Just when he builds up the courage to declare his feelings, she falls head over heels for Billy Walsh, a new American transfer student.

Bernie and Joan are two fiery flirters who are passionate about everything from hookups to breakups and each other. When he sets up his best friend, Danny, with her roommate, Debbie, the sparks soon fly as they try to navigate the relationship minefields from the bar to the bedroom and are eventually put to the test in the real world.