Primatologists know: we all do strange and wonderful things when we don’t think anyone is watching. Eat some grass. Scratch an itch. Reveal the fundamental secrets of our species. British primatologist Dr. Valerie Naymark lost her mother slash assistant in Tanzania. She now returns to the Congo to try to find her mother and restore her reputation with the biggest expedition slash investigation of her career. Dr. Naymark’s mother is missing, but may be disguising herself as one of her subjects.