Agatha Buckley, the ambitious president of All Saints College, gambles campus funds on a dangerous expedition to Borneo in search of fossils of the first human being, the Missing Link. She hires John Maletesta, a one-armed vet burdened by PTSD, to ride shotgun for the college professors on their journey. A pirate attack, an attempted assassination and the mysterious disappearance of their guide raise alarms about an unknown adversary, but the group valiantly presses onward into the interior of Borneo. Maletesta discovers another side of his life as he confronts the challenges of the expedition and unexpected treasure.