Brazil, 1949. A photographer crawls into a mission deep in the Amazonian rainforest and dies. On one of his films is an extraordinary shot: a man with skin white as snow and an elongated cranium. Deformed human... or extra-terrestrial being? Kathy Austin, having reluctantly become the specialist in such situations, is immediately sent by the crown to investigate. But the British aren't the only ones with an interest in the bizarre creature...