In a devastated post-war Korea, where mutated outcasts known as Omegas are exploited for labour, Mia hides her true identity while working at an eerie fishing store – a remnant of humanity's nostalgia for the lost seas. When Sujin, a newly recruited government worker, grows suspicious of Mia's unusual behaviour, her investigation into this underground world begins to crack her unwavering faith in state ideology. From visionary director Park Sye-young comes a haunting dystopian thriller that masterfully blends elements of horror and social commentary, exploring themes of identity, survival, and the dark consequences of unchecked authority.