Some paving slabs are delivered to Bob's yard for a special job which Mr. Bentley the Building Inspector wants done. Meanwhile, Wendy is taking a day off to do some water-colour painting in the country. Bob and team arrive at the Town Square to find that the slabs have to be assembled into the pattern of the town's coat of arms. When Mr. Bentley calls Bob into the Town Hall to fix a squeaky door, the Machines try to assemble the pattern themselves, but cannot get it right. Wendy's attempts to finish her painting are frustrated by Scruffty, who picks up Wendy's mobile phone, thinking it is a bone, and buries it somewhere in a nearby field. Farmer Pickles saves the day by giving Scruffty a real bone, which he buries right next to Wendy's phone. Bob returns and helps the machines to assemble the slabs correctly, and they head back to the yard where Wendy proudly shows them her paining - a picture of Scruffty holding her phone in his mouth.