Dink, Josh, and Ruth Rose are ready for a relaxing picnic out on Squall Island. Wading out into the water, the three friends stumble upon an incredible surprise hidden right in the sand: a crisp one-hundred-dollar bill! Eager to continue their lucky streak and explore more of the area, they plan a return trip for the very next day. When they arrive back at the shoreline, the friends are met with an impossible sight. Squall Island has completely vanished into thin air! An entire piece of land cannot simply float away overnight. The trio knows something highly unusual is going on, and they are determined to get to the bottom of it. Join the young detectives as they search for clues along the beach and try to uncover the truth behind the disappearing landmass. You will need to keep a sharp eye out for evidence as you follow along with their investigation. Will Dink, Josh, and Ruth Rose be able to solve the puzzle before the trail goes completely cold? Grab your detective gear and jump into this puzzling case to find out what is really going on in the water.