Tom, greeting-card writer and hopeless romantic, is caught completely off-guard when his girlfriend, Summer, suddenly dumps him. He reflects on their 500 days together to try to figure out where their love affair went sour, and in doing so, Tom rediscovers his true passions in life.
Dylan and Jamie think it's going to be easy to add the simple act of sex to their friendship, despite what Hollywood romantic comedies would have them believe. They soon discover however that getting physical really does always lead to complications.
A veteran high school teacher befriends a younger art teacher, who is having an affair with one of her 15-year-old students. However, her intentions with this new "friend" also go well beyond platonic friendship.
Longtime friends Ronny and Nick are partners in an auto-design firm. They are hard at work on a presentation for a dream project that would really launch their company. Then Ronny spots Nick's wife out with another man, and in the process of investigating the possible affair, he learns that Nick has a few secrets of his own. As the presentation nears, Ronny agonizes over what might happen if the truth gets out.
Led by Woody, Andy's toys live happily in his room until Andy's birthday brings Buzz Lightyear onto the scene. Afraid of losing his place in Andy's heart, Woody plots against Buzz. But when circumstances separate Buzz and Woody from their owner, the duo eventually learns to put aside their differences.
Joel Barish, heartbroken that his girlfriend underwent a procedure to erase him from her memory, decides to do the same. However, as he watches his memories of her fade away, he realises that he still loves her, and may be too late to correct his mistake.
In the carefree days before World War I, introverted Austrian author Jules strikes up a friendship with the exuberant Frenchman Jim. Both men fall for the impulsive and beautiful Catherine, but it's Jules who wins her hand. After the war, Jim visits Jules, Catherine and their daughter in their Austrian home and discovers not only that his feelings for Catherine are unchanged, but also that they're reciprocated.
A high school senior drives cross-country with his best friends to hook up with a babe he met online.