The 765 Production Studio girls are excitedly gearing up for the upcoming International Music Festival on Vacation Island, which boasts a top-notch resort and thrilling amusement park experiences. However, their producer stuns them with the news that only one unit can participate. Divided into three groups, the girls are presented with three different scenarios where one of them will be selected to embark on a three-day vacation ahead of the festival's main concert. Eager to participate and showcase their talents, each group sets out to experience the festival in their own unique way, from the moment they disembark the boat to the thrilling performance ahead.