January 8, Tom Hansen meets Summer Finn, the new assistant to his boss. Tom studied architect but works for a greeting card company in Los Angles. Following a karaoke night, Tom's friend was drunk and said that Tom like ed Summer, but she does not believe in true love, and does not want a boyfriend.Tom shows Summer his favorite spot in the city. After months of dating, Tom gets into a fight with a man who flirts with Summer, and they have their first argument. On day 290, Summer and Tom end their relationship. Tom does not take the breakup well, and Tom's friends call his younger sister, Rachel, to calm him down.Summer quits her job at the greeting card company. Tom's boss moves him to the consolations department, as his depression is not suitable for happier events. Months later, as Summer and Tom attend the wedding, they dance at the wedding and Summer catches the bouquet. They sit next to each other on the trip home, and Summer invites Tom to a party at her apartment. He attends the party, but leaves when he sees that Summer is wearing an engagement ring. After a few days, he returns to work with a hangover and after an argument, quits his job.On day 488, Summer sees Tom at his favorite spot in the city, and they talk. Summer explains that he was right about the existence of true love and that she discovered in someone else all the feelings she had never been sure about with Tom. Summer holds Tom's hand. She says she is glad to see Tom is doing well. As she leaves Tom tells her he really hopes she is happy. Twelve days later, on Wednesday, May 23, he attends a job interview and meets a girl who is also there for interview for the same job. They talk, and Tom learns she shares his favorite spot and dislike for the parking lots. Before entering the interview, he ask her for a a date to have coffee. He asks her name, and she replies "Autumn". The End