Altocelarophobia. The fear of high ceilings.
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 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...