After being dumped by his model girlfriend, aspiring writer Quincy Watson quits his job and is inspired to pen the ultimate how-to book on breaking up. When it becomes a smash bestseller, he starts giving his player cousin, Evan, choice tips on how to win the battle of the sexes. But when Evan's beautiful girlfriend Nikki gets wind of the plan, it's these players that end up getting played.

Genaro is going to be his brother's best man. What should be a happy occasion for the family turns out to be an awkward experience, as his brother is marrying Genaro's ex-girlfriend...

Just months before Jenn's 30th birthday she is dumped by her long term girlfriend, Frankie. With the help of a surprise house guest, Jenn sets off on a mission to get Frankie back.

Han-sung runs into his ex-girlfriend Soo-young after taking a year off from university. Unfortunately she has a new boyfriend Se-won, who is a director of a graduation film which Han-sung is supporting.

A young man begins to suspect that his ex-girlfriend, Glauren, has been having a secret affair with Hellboy, so he enlists his friends to help him discover the truth.

As bass guitarist for a garage-rock band, Scott Pilgrim has never had trouble getting a girlfriend; usually, the problem is getting rid of them. But when Ramona Flowers skates into his heart, he finds she has the most troublesome baggage of all: an army of ex-boyfriends who will stop at nothing to eliminate him from her list of suitors.

A jilted ex-girlfriend plots revenge after her former beau comes back to their hometown with a new lover.

Pushed to the breaking-up point after their latest 'why can't you do this one little thing for me?' argument, Brooke calls it quits with her boyfriend Gary. What follows is a hilarious series of remedies, war tactics, overtures and undermining tricks – all encouraged by the former couple's friends and confidantes …and the occasional total stranger! When neither ex is willing to move out of their shared apartment, the only solution is to continue living as hostile roommates until one of them reaches breaking point.

When her scientist ex-boyfriend discovers a portal to travel through time -- and brings back a 19th-century nobleman named Leopold to prove it -- a skeptical Kate reluctantly takes responsibility for showing Leopold the 21st century. The more time Kate spends with Leopold, the harder she falls for him. But if he doesn't return to his own time, his absence will forever alter history.

Hard-luck cabbie John Winger, directionless after being fired from his job and dumped by his girlfriend, enlists in the U.S. Army with his close pal, Russell Ziskey. After his barely satisfactory performance in basic training, the irreverent Winger emerges as the figurehead for a ragtag band of misfits. However, his hijinks threaten to cause an international scandal when he inadvertently commandeers a military assault vehicle behind enemy lines.

Michael and Joanna are a young and successful married couple who appear to have it all. But when Michael finds himself alone on a business trip with an attractive new colleague and Joanna encounters the other great love of her life, each is thrust into an evening of temptation.

An actress dumps her boyfriend when she gets a television show. He finally gets over the breakup and falls in love again, just in time for his ex to return -- wanting him back.