In the year 2210, humanity has undergone extensive genetic modification. Sealmen have been designed to live and work in the oceans but are tied to the service. Gillmen, who can breathe underwater, are rapidly replacing them. Stephanie Maran, a fifteen year old gillman, has vanished from her comfortable San Francisco home. James Tyler, a senior agent for Southwest Securities, is charged with finding Stephanie Maran and bringing her home, but what he finds under the sea will challenge all his preconceptions of what it means to be human in the modern world.
Adam is the story of a scientist named Fischer, who uses a tailored retrovirus to implant the Fox P2 gene (sometimes called the "language gene") into a cage full of rats and a mouse named Adam. Fischer is a good, careful scientist, but Fischer forgets that the law of unintended consequences can make fools of us all.