A special beam of sunlight that penetrates the atmosphere separates several strangers in their own lives and throws them collectively into the infinite world behind the sun. This sunless territory is divided into countless independent trial dungeons, where supernatural stories, interstellar disasters, and doomsday ruins are staged in turn. People with different personalities are forced to form a team. While they must work together to resist the endless deadly dangers in the dungeon, they must also beware of the hidden selfishness and calculations within the team. On the road to survival in endless reincarnations, they slowly pieced together the truth: behind the sun is a huge man-made cage, and all trials are a cruel selection of human civilization.
Intention: Despite being trapped in the shadow of stars, the human heart has its own immortal light.