Lieutenant of the French forces engaged in Mali, David Faber is seriously burned during the explosion of his armored vehicle. Repatriated to France for intensive care, he must begin a long convalescence, under the worried but devoted gaze of his sister Jeanne. They meet again in the family house in the Alps, between mountains, lake and forests. Jeanne tries to reconnect her brother with the past, but David, who suffers from amnesia after the accident, does not seem to be interested in reconciling with the man he used to be.
Albert Spaggiari is arrested in Nice and brought to a judge's office for interrogation, but he escapes to South America where he meets a journalist who is investigating the event.
África central, 1870. Acompanhado por um grupo de caçadores indígenas, o antropólogo escocês Jamie Dodd (Joseph Fiennes) atravessa a floresta tropical à procura de uma nova espécie. Ao encontrar uma tribo de pigmeus, Jamie acredita ter achado o "elo perdido" que faria a ponte evolucionária entre o homem e o primata. Ele captura dois pigmeus chamados Toko (Lomama Boseki) e Likola (Cécile Bayiha) para apresentá-los na Academia de Ciência de Edimburgo. A amizade que surge entre os três termina colocando em risco a carreira do cientista.
