At the peak of the colossal Demon God Tree lies a legend: anyone who reaches its summit can have their deepest wish granted.

Drawn by the promise of ultimate power, ambitious explorers flock to conquer its deadly canopy—bringing along expendable slaves known as "Lumberjacks" to face the fatal hazards in their place.

For a Lumberjack, true freedom comes at an impossible price: survive 100 expeditions alive.

Having defied death through 99 grueling trials, the end of a lifetime in chains is finally within reach. Now, a young Lumberjack named Jack embarks on his hundredth and final climb.