Centuries ago, Earth teetered on the brink of destruction. To escape, May and her family embarked on a cosmic voyage as part of an ambitious mission to colonize a new world. However, instead of the promise of a new life, she crash-landed back on an Earth she no longer recognized.

Still holding onto hope that her family reached the new world, May seeks to contact them. But the key to reaching them might be locked within a fortified mountain bunker, its ominous secrets deeply rooted in local lore.

As she searches for a way to open the bunker, she finds herself under the wary gaze of the local people. Their growing suspicion and fear center around one belief: opening the Mountain could spell certain doom for everyone.