Incident at Latitude 25 North is the first installment of the Pelagia Trilogy, a series about the environment. McClendon Park, an environmental entrepreneur, becomes involved with BIO, a marine research organization. Parkas attempts to foster shark conservation and stop gold mining are at odds with the interests of Senator C.B. Rite, a powerful, staunch anti-environmentalist. The situation culminates when a yacht carrying the senator and four representatives of the Japanese fishing industry is commandeered on its way from Panama City, Florida, to Key West. Political intrigue, revenge, and a disturbing act of eco-terrorism hammer home demands to save the environment.