主人公是22岁的少女妮可，父母外出后独自照看房子，她和好朋友韦萝妮克享受着夏日惬意的时光。这种平静被妮可的哥哥打破了，他带着他的乐队出现了，他们正打算为专辑录歌。两个女孩的友谊受到了考验。她们的假日出现了意想不到的转折。妮可开始失眠，并且收到了来自一个只有十岁的男孩坚持不渝的追求。

Where did we come from? What makes us human? An explosion of recent discoveries sheds light on these questions, and NOVA's comprehensive, three-part special, "Becoming Human," examines what the latest scientific research reveals about our hominid relatives.Part 1, "First Steps," examines the factors…