In a remote mountain town, every ten years, an inexplicable event takes place—a mysterious dome encases the town, sealing it off from the outside world for exactly one week. The townspeople have come to call this phenomenon "The Enclosure." As the latest occurrence of the Enclosure approaches, the town is on edge. Ethan, an ambitious investigative journalist with ties to this town, returns hoping to uncover what lies behind this baffling phenomenon while seeking closure for his past. Accompanying him is his niece, Lily, a precocious teenager whose curiosity rivals Ethan's own. Meanwhile, Leena, a local artist with an uncanny ability to intuit the dome’s appearance, begins experiencing vivid dreams connected to the Enclosure, drawing her deeper into its mystery.

As the Enclosure descends once again, strange events unfold both inside and outside the dome. Communication with the outside is severed, and those trapped within start experiencing haunting visions linked to their innermost fears. Ethan and Lily join forces with Leena to decipher these eerie occurrences, guided by Leena's prophetic artwork that seems to hold clues about controlling or even stopping the Enclosure. As they delve deeper into unraveling the town’s secrets, trust between friends and neighbors deteriorates under the stress of confinement. With tensions rising and time slipping away, they must confront not only the enigma of the Enclosure but also truths about themselves that they have long kept hidden.