When an experimental airship crashes in the uncharted arctic wilderness, young engineer Isla and her surviving crew must embark on a desperate trek across a land of eternal winter. With supplies dwindling and temperatures plummeting, they discover that the frozen north holds more than just ice and snow—it guards ancient myths that are startlingly real. Guided by fragmented maps and the cryptic warnings of a lone fur trapper who knows the land's dark secrets, the group encounters crystalline caves that sing, forests of ice that move, and creatures from legends thought to be mere stories. But as they unravel the mystery of a lost civilization that mastered the cold, they realize they're being hunted by shadows that thrive in the endless night. To survive, they must uncover the truth behind the myths and learn that in the frozen north, some secrets are buried for a reason.