When Elder John Groberg (Christopher Gorham) graduates from college, his church (the Mormons – LDS) sends him on a three-year missionary trip to the Pacific island of Tonga. Ignorant of their language, customs, and pretty much any other useful information about these isolated people, Groberg is forced to rely on his faith to get through his journey. At first, with a Christian church already on the island, the people ignore him. However, circumstances involving miraculous healings get the attention of some of the islanders. Starting with a few devoted listeners, Groberg soon gains a following on the island and begins to win some over to his message.