Emily has lost control of her Amulet and is imprisoned in the Void, where she must find a way to escape the influence of the Voice. Meanwhile, Emily's brother, Navin, travels to Lighthouse One, a space station where the Resistance is preparing to battle the approaching Shadow forces that would drain planet Alledia of all its resources. Emily and Navin must be smarter and stronger than ever to ensure Alledia's survival.


艾米莉對護身符失去了控制，並被監禁在虛空中。在那裡她必須找到方法逃避聲音的影響。與此同時，艾米莉的兄弟納文前往太空站一號燈塔。抵抗軍在那為了避免行星阿雷蒂亞的資源消耗殆盡，正在準備與即將到來的暗影部隊作戰。艾米莉和納文必須比變得更聰明更強大，來保護阿雷蒂亞。

After tragedy strikes their family, Emily and Navin move with their mother into the old, mysterious home of their great-grandfather. On their first night in the strange house, Emily and Navin's mom is kidnapped by a tentacled creature. Determined to rescue her, Emily and Navin are led into a world of robots, talking animals, flying ships, new friends... and enemies. Emily learns that she is a Stonekeeper and essential to the survival of this world, and that her incredible story is only just beginning.