Having found and befriended the forest-dwelling Timals, Tarzan has a plan to descend upon the Valley People and destroy their fields. . . fields of the Flowers of Forget, the pollen of which has the power to turn the strongest mind into a passive fool! And Carson of Venus isn't one to sit idly by, especially when the Myposans have captured all of the mythical Gerloogans, and are slowly dehydrating them to death!