By the time night fell, Adam had already climbed the steep mountain on the side of the valley and found himself a naturally made cave to stay for the night.
After organizing the inside of the cave and setting up a proper security and surveillance system, Adam glanced at the night sky in the secret plane in fascination.
There were no celestial bodies inside the secret plane. That meant, no sun, no moon, and not even stars. Despite that, there was a clear distinction between day and night in here.
"How interesting!" Adam stroked his chin as he gazed at the nighttime scenery.
Naturally, he was very curious about the mechanism of the day and night system here. He cast one last glance at the dark sky and then went back inside the cave, covering its entrance.
He started a fire and then sat down cross-legged on the ground. Valerian jumped down as well and looked at him excitedly. He stood on his hind legs and clenched his two paws.
"Myu! Myu!"