It's the last days of summer. Best friends Seth (Ian Nelson) and Jameson (Ellar Coltrane) are getting ready to perform--and party--at local rock venue The Alamo. But before the night begins, both young men come face- to-face with serious reality checks: Seth receives life-changing news from his girlfriend Mel (Analeigh Tipton), and Jameson has to choose between his on-again-off-again girlfriend Corin (Elena Kampouris) and a new girl he's just met, the outspoken Harmony (Victoria Justice).

At the show, Seth and Jameson's friends are too caught up in their own lives to be much help: young rocker Taylor romances his new crush Dana (Ella Hunt), and awkward Jack "Rabbit" (Bill Milner) avoids his childhood friend Lexi (Lana Condor) after learning what she did at her sister's wedding. These intertwining friend-dramas, fueled by a lot of drinking, unfold against a backdrop of live music performed by the best bands in town.

By the end of the night, these young men and women are confronted with a series of fast- approaching life decisions that will either leave them stuck in the comfort of adolescence, or catapult them into adulthood.