The last day of summer is coming to an end, and fans of surfing Mackenzie and her friend Brady do not want to leave the beach. In the evening they catch a huge wave, which carries them not only in space but also in time - half a century ago! Here, in the 60s, friends find themselves at the center of the confrontation between two noisy companies - surfers and rockers. It turns out that everything that happens around is nothing but a famous retro musical. Mackenzie and Brady have only one chance to get back home - to return the musical history to its former course. To do this, the guys have to master the language of song and dance.