Dana's at the museum studying Mammoth fossils when she tells Dad and Saara a fantastical story about the cave people that lived among them. Dana and Saara are shoveling the driveway when Dana is distracted by a Troodon who has dug a den under her tree house. Dana wants to figure out why the Troodon dug the dens, but also promised to help Mom shovel the driveaway.
