A voiceover explains that he has been waiting for a long time, but to explain why, he needs to go back to the beginning. Jason begins by telling the audience that every relationship reaches the "So At that point, Jason knows the relationship is over, as he is not ready to start dating.
Jason is currently working with his best friend Daniel Miles Teller at a publishing house designing book covers. Their friend Mikey Michael B. Jordan , a young doctor who has been married to Vera Jessica Lucas since the end of college, comes to them after Vera requests a divorce.
The three decide to go out to a bar and celebrate being single. The group meets up with Daniel's female wingman , Chelsea Mackenzie Davis , as they try to get Mikey's mind off of his wife. Mikey meets a girl with glasses Kate Simses , while Jason meets Ellie Imogen Poots , and hits it off with her after teasing another man that was trying to buy her a drink.
Mikey gets the girl's number, but decides not to call, resolving to work it out with his wife. Jason sleeps with Ellie, but escapes her apartment when he discovers circumstantial evidence that she may be a prostitute. The next day, Jason and Daniel make a book cover pitch to a new author, who happens to be Ellie. Jason is able to explain himself and the two begin seeing each other on a regular basis.
Meanwhile, Daniel begins to fall for Chelsea, and the two begin seeing one another. Additionally, Mikey meets with his estranged wife, and when she claims that the reason their marriage fell apart is because he is not spontaneous enough, Mikey kisses her, and the two sleep together in the hospital, reigniting their romance. All three friends attempt to keep their relationships a secret, due to their earlier agreement that they would stay single.
The relationships all come to a head during Thanksgiving, a time that the three friends usually spend together, but varying circumstances keep them apart. Jason agrees to attend a funeral for Ellie's recently passed father, Mikey plans a Thanksgiving dinner with his wife, and Daniel attends the traditional Thanksgiving feast with Chelsea, free to openly tell the guests about their relationship.
Jason ultimately decides not to attend the funeral, not ready to fully commit to Ellie, and their relationship falls apart. Mikey has a serious conversation with his wife during their dinner, causing her to admit that she no longer loves him. Jason and Mikey head to the dinner where they discover Daniel's relationship with Chelsea, and when he denies that they are dating, his relationship falls apart as well.
Although the three fight about keeping their relationships secret, they repair their friendship and try to recover their relationships. Mikey calls the glasses girl from the bar, setting up a date, and Daniel reunites with Chelsea after being hit by a taxi and ending up in the hospital.
However, two months later, Jason has still not reconciled with Ellie, despite still being in love with her. Mikey and Daniel help Jason by encouraging him to tell her of his love at her weekly book readings, which are sparsely attended. However, upon their arrival, the reading is full and Jason is unable to figure out a way to talk with her.
He decides to make a scene by improvising a book reading, referencing their first meeting and requesting that they start over by meeting in Gramercy Park.
Returning to the beginning, Jason is waiting for Ellie in Gramercy Park. Ellie arrives and sits on the bench with him, where Jason starts their talk, beginning with, "So