In a near-future Africa, elephant herds are nearly extinct. A wildlife tracker, haunted by the poaching of his own family's land, discovers that one final matriarch is leading her herd along a forgotten migration corridor that stretches from Kenya to Tanzania. Governments, poachers, and corporations all want control of the land. The tracker must risk everything to protect the herd on their perilous journey, uncovering that their ancient route may also be the key to saving an entire ecosystem from collapse.