In the kingdom of Ashoka, magic is a physical resource that is rapidly depleting, leaving the nation vulnerable to its enemies. Four estranged siblings—the Maharani, a prisoner, a rebel, and a scholar—must set aside their deep-seated distrust to find the legendary Ivory Key, which is rumored to unlock a new source of magic. As they navigate a series of ancient puzzles and external threats, each sibling secretly pursues the key to achieve their own conflicting personal goals.