It is not necessary to read the previous Black Petunia stories. This story is of the same universe, but through a different character's perspective many years later than the other stories.
Onto the suspension railway cart he climbed into. Around him, cavern walls stretched upwards. Below him, the void seemed to reach out to him. He tried not to look down as the cart started moving. Slowly, but steadily the wheels slid along the thick, black wire. He took a deep breath. "I'm coming Boris," he breathed out. "Hang tight, buddy."
Suddenly, the cart came to a jarring halt in the middle of the gap. He gasped at the stop. He looked back