After an unexpected accident disbands the five-member idol group Thunder Boys, the members are forced to take over a failing convenience store, Boram Mart, as compensation for their unpaid fees. Led by former group leader Choi Ho-Rang, they begin a completely new chapter of their lives, learning to run the store from scratch with the help of long-time part-time employee Oh Ye-Rim, while facing daily challenges that test their teamwork, friendship, and lingering dreams of returning to the stage.