When jake finds the old canoe filled with rocks and hidden in sand near the river, he and Ben are thrilled! But someone wants to bury it. Why? The trouble begins when they clean it up, discover a treasure map, and set out in their new boat in search of adventure.

What they find instead is terror: alligators swarming around them, trapping them on the tiny island in the middle of the eerie Swamp. But there is an even more fearsome enemy: a shadowy figure who is waiting to kill them if they survive the alligators and the quicksand that lies beyond...