When Ruth Rose and her friends, vacationing in Florida, discover that her grandmother is about to invest in a project to recover sunken treasure, they stumble upon evidence that the entire plan may be a fraud.
Dink, Josh, and Ruth Rose investigate possible crime at a summer camp, search for treasure in Plymouth, Massachusetts, hunt for the President's missing dog in Washington, D.C., and have a spooky experience during a sleepover in Sleepy Hollow.