After personally investing in a treasure hunt off the coast of Florida, Marty Lagina and Craig Tester are thrilled when their search uncovers rare and historical artifacts; the duo must come to terms with the complicated world of treasure ownership.

The Laginas learn that while on a trip to Arizona, Gary Drayton may have gotten to the bottom of one the biggest treasure mysteries of all time, one that has resulted in countless deaths and disappearance for those obsessed with finding it.

Rick and Marty's good friend and world-class wreck diver John Chatterton heads south to search for a never-recovered Spanish ship off the coast of Florida; Gary Drayton shares with the brothers his most compelling and valuable find.

Things get dicey when the Laginas deploy Matty Blake to the Wild West, where he assists in a dangerous investigation with a local treasure hunter.