Bob is building a time capsule for Mr Ellis. It is to be buried outside the museum and in 100 years time someone will open it. However, when Spud finds it, he takes it away thinking it's a treasure chest! He throws everything out of it and plans to bury it himself. Will someone find Spud and the missing time capsule before Spud buries it?
Farmer Pickles asks Bob to build a dog house for Scruffty, and drops his phone. Mrs Percival phones to remind Farmer Pickles to look after the guinea-pigs for the school holidays, and Wendy answers it. Wendy sends Scoop off with the phone and the message, but he passes it on to Spud, who passes it on to Travis. When Farmer Pickles gets the message, he thinks he's getting a delivery of little pigs and realises he has nowhere to put them.
Bob finds a hibernating Porcupine in Farmer Pickles' cottage so he sends Scoop to take it back to the yard. Roley decides to look after it. When Farmer Pickles arrives to see Wendy, Scruffty jumps out of Travis' trailer and he and Pilchard chase each other. Roley worries that it might wake the Porcupine.
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.
Wendy and the machines are building a new path for Mrs Potts. Mrs Potts won't let Roley work on the path because she is worried he will crush the flower beds. Roley feels hurt but feels better when supervising Wendy with the hand-roller. However, Muck accidentally drops the flagstones and they break. But Dizzy comes up with a bright idea.