When Jane Sewell returns to the Braxilian jungle to help her anthropologist father in his work, it is not the happy reunion she is expecting. She doesn't find the thriving village she remembers. Just a pile of bones. Human bones. Picked clean. And then the ancient steamboat Galcao chugs cheerfully into sight, carrying a ghastly cargo of grisly death. And, for Jane, the horror really begins. Somewhere, out in the seething jungle, a remorseless army is on the move. And it seems as though nothing can stop its savage, merciless drive.