In 1964 New Jersey, Douglas (John Magaro) drops out of college to focus on the band that he and his friends Gene (Jack Huston) and Wells (Will Brill) formed in high school.
Douglas is attracted to high school student Grace (Bella Heathcote), who seems to prefer jocks. That changes when lead singer/guitarist Gene can't perform after swallowing a lit joint. Doug takes over and wows the local crowd when he sings "Time Is On My Side." After that, Doug takes over as lead vocalist, to Gene's resentment.
The band, which plays covers of the Rolling Stones, the Kinks and Bo Diddley, continues to play local parties while trying to make it into the big leagues.