Determined to become a wizard, twelve-year-old Randal is delighted to be accepted into the famed School of Wizardry, but his apprenticeship is marred when he realizes that one of the master wizards is using evil spells to destroy the school and gain supreme power.
The gang befriends the Fenwicks, missionaries to Costa Rica who are spending a month at Sugar Creek enjoying fishing and their motorboat, the Vida Eterna, while giving Mr. Fenwick's ailing heart a rest.
While trying to recover a sacred stone belonging to an Indian village, Indiana Jones and his two companions become prisoners of a ruthless sect dedicated to the worship of the evil goddess Kali.