Suddenly the US east coast is hit by a type of natural disaster formerly reserved, except after a major earthquake, for the Pacific and Indian ocean rims: tidal waves of the destructive tsunami type. Scientist and fiction author John McAdams attends a national emergency conference which concludes the phenomenon must be man-made, quite possibly abusing the findings of John's secret former Sea Lion project, but who wants to and has the means? Indeed John soon finds himself set-up for a murder and chased. Major destructions mean major contracts for construction and coastal defenses, so building tycoons like Victor Bannister certainly have a considerable interest...

Dr. Henry Jekyll is a well-regarded physician whose evenings are spent researching a rare and sacred Amazonian flower so potent it's said to literally separate the soul, giving life to man's Dark Self. The obsessive experiments to isolate its psychotropic properties happen to coincide with a series of brutal murders gripping the city with fear. Jekyll knows it's no coincidence. While his nights are lost to him, he awakens with bloody mementos and violent memories of the screams of his victims. He knows the Dark Self is coming into his own. It's even given himself a name: Mr. Edward Hyde. Anxious to plead guilty, waive trial, face sentence, and be put out of his misery, where he can no longer do harm, Jekyll solicits the help of Claire Wheaton, a compassionate attorney attracted to unusual and lost causes. Agreeing to represent Jekyll, her case for extreme mental imbalance is convincing...