The Alden family rents a houseboat to drift down the river, and encounters a mystery in the little towns along the river, involving a fast black car.

"Valdez Jones VIII calls himself Wrecker because his great-great-great-great-great-grandfather salvaged shipwrecks for a living. So is it destiny, irony, or just bad luck when Wrecker comes across a speedboat that has run hard aground on a sand flat? The men in the boat don't want Wrecker to call for help--in fact, they'll pay him to forget he ever saw them. Wrecker would be happy to forget, but he keeps seeing these men all over Key West--at the...