While digging a ditch at Farmer Pickles' field, Bob and Scoop come across some old bones. Bob goes to show a bone to Mr. Ellis at the museum. Scoop is left on guard at the ditch. Spud persuades him to leave and see the bigger bones he's found. Then Spud decides to put on his own dinosaur display. Mr Ellis thinks they have found a stegosaurus skeleton but is very disappointed that some of the bones are missing. Bob goes back to the field and Scoop remembers what Spud told him.