Tifanny, Pojo and Charlotte go with Gina on a prep school field trip to do some real-life paleontology at a real dinosaur fossil site. Charlotte finds what appears to be a fifty-pound, peanut-shaped rock, which turns out to be a Saurian egg, preserved using that lost race's technology. When the cute baby Saurian inside wakes up, the kids befriend him, but for some reason, Gina thinks Saurians are too dangerous to live. Can Tif' and company keep their new friend Houston, the last Saurian, at home without being caught?