Death. A point of no return that makes the living feel confusion and fear. No one has ever come back from there, and on the other side, no one has been there yet as a guest.
But with the invention of thanatonautics, everything changes. A few daredevils discovered a way to travel along the edge of shadows—and that led to unpredictable consequences. After all, every confession wants to prove it’s right and colonize the afterlife.