Mia (Emma Stone) longs to become an actress, but to this day she is still just an ordinary barista in the cafe on set. Although she keeps participating in auditions large and small, Mia only gains failure. One day, at a party, Mia meets a man named Sebastian (Ryan Gosling). At first, there is a small conflict between the two, but soon, Mia is attracted by Sebastian's shining talent and his pure pursuit of jazz, and the two finally get together. With Sebastian's encouragement, Mia quit her job in the coffee shop and concentrated on writing a script for herself. At the same time, Sebastian joined a popular jazz band in order to obtain a stable income and started Playing modern jazz music that she didn't like, but she didn't expect to become famous. As time goes by, the distance between the two people who are striving to pursue their dreams becomes wider and wider. They must make a choice between ideals and feelings.