Under the Dome follows a town trapped by an inexplicable dome, exploring survival, mysteries, and a descent into unforeseen sci-fi chaos.

An invisible and mysterious force field descends upon a small actual town of Chester's Mill, Maine, USA, trapping residents inside, cut off from the rest of civilization.

The trapped townspeople must discover the secrets and purpose of the "dome" or "sphere" and its origins, while coming to learn more than they ever knew about each other and animals too.