Arthur's parents have been married for 10 years and it's time to celebrate! But the festivities are cut short when the van breaks down, stranding the whole family. Will the Reads miss their fancy dinner reservation? And what about Arthur's special "Bionic Bunny" sleepover with Buster?! Just when things couldn't get any worse, Arthur and D.W. end up locked in a diner storeroom - but when they hear the inspiring radio tale of Crooning Cowboy Kid Carter and his little sister sidekick, Arthur realizes that the best celebration of all is just being with his family.