George Gibson is determined to check off the last item on his bucket list: a trip across America. He hops in his RV to visit - and sketch - the buildings and places across America that he and his wife never got to see. When his daughter learns of a young boy forced to give up a beloved Saint Bernard named Lewis, she suggests George adopt the animal as a traveling companion. The dog even fits perfectly in the sidecar of George's Vespa motor scooter...