The shy and introverted art student Iris has spent much of her life avoiding gymnasiums, shopping malls, and churches. Challenging herself to drop her unwanted nickname of 'Umbrella Girl' - due to always carrying an umbrella indoors - she joins her best friend Audra on a school trip to a power station-turned-art gallery in the city. However, deep inside the gallery, Iris loses both Audra and her umbrella and is left to navigate the twisting, confusing corridors on her own. Worse, a dark, old, and hungry something watches her every step, waiting for a moment of weakness...