Six “Gap Bearers” are swept into Metro Loop Zero. Some have lost their memories, others their senses. They face one chilling trial after another in places like the Maze of Taste, the Corridor of Time, and Echo Town. Every stop is an ordeal that tears at their past, and every rule points to an accident from seven years ago that was deliberately buried.
When the rusted train carries their shattered memories toward the final stop, they discover that the loop was never a prison. It is the only way for the forgotten to repent and for the survivors to find the courage to remember. And what they have been holding in their hands all along is not a gap, but the last piece of the puzzle that will let them piece the truth together.