In-universe glossary for Heaven is Empty
A metaphysical space experienced during a near-death state, described as a cacophony of voices and a clash between endless light and approaching darkness. It serves as the transition point where individuals may perceive glimpses of other lives or timelines.
A support group ostensibly for survivors of Near-Death Experiences (NDEs). While it appears as a humble gathering in a church basement, it serves as a front for Alex to identify and recruit "Thresholders" who have glimpsed the true nature of reality.