As a final wish by her grandfather, Kana and her brother are tasked with seeking out the Jadestone mountain, a lush mountain holding a jade-colored gemstone at its peak. While the reasoning is unclear, Kana knows it has something to do with her inherent abilities, and she eagerly departs.

When they near the town of Jadestone, they are beset by bandits, only to have a mysterious figure arrive, quite literally being dropped at their feet, after being bucked from his horse. He takes to action and swiftly guns down the bandits.

Kana is fascinated by the stranger who saved her life. He has some mystical properties about him yet his nature and attitude resonate with something a bit darker. He introduces himself as Mordecai, a gunslinger with a penchant for all things magical.

He takes an interest in Kana's future and offers to assist her and her brother up the mountain. Together, along with the help of three local townsfolk, they attempt to brave the mountain and uncover its secrets. Little do they know, there are secrets both at its peak and below.