Get ready to cast off on a wonderful floating vacation. The Bobbsey family is spending their summer on the water after Mr. Bobbsey purchases a beautiful houseboat named the Bluebird. Bert, Nan, Flossie, and Freddie are absolutely thrilled to pack up their things and move onto the boat. From setting up their cozy new cabins to watching the scenery slowly drift by, the twins are ready for a summer unlike any they have ever had. As the Bluebird travels down winding rivers and across peaceful lakes, the children spend their days fishing, swimming, and exploring the lush green shorelines. Along the way, they meet a hardworking farm boy named Will Watson and quickly invite him to join in their fun, proving that the Bobbsey twins are always ready to make new friends. But life on a houseboat brings its own set of surprises. When Flossie and Freddie accidentally get stranded on a tiny island, it is up to the older twins to launch a clever rescue. Soon after, the siblings uncover a sneaky plot by a group of strangers on the shore. You will sail along with the twins as they work together to stop the criminals and save the day in this classic river adventure.