Twenty-five years after growing up together in Penghu, a group of classmates reunite, each carrying the scars of adulthood. Old feelings resurface, bitter rivalries are tested, and estranged families confront long-buried wounds. As new relationships emerge and hidden pasts come to light, the summer fireworks festival brings their unresolved conflicts to a head, forcing them to reckon with love, family, regret, and the possibility of moving forward.