Teenager Owen is just trying to make it through life in the suburbs when his classmate introduces him to a mysterious late-night TV show — a vision of a supernatural world beneath their own. In the pale glow of the television, Owen’s view of reality begins to crack.

To put their demons to rest once and for all, Josh Lambert and a college-aged Dalton Lambert must go deeper into The Further than ever before, facing their family's dark past and a host of new and more horrifying terrors that lurk behind the red door.