John H. Groberg, a middle class kid from Idaho Falls, crosses the Pacific to become a Mormon missionary in the remote and exotic Tongan island kingdom during the 1950's. He leaves behind a loving family and the true love of his life, Jean. Through letters and musings across the miles, John shares his humbling and sometimes hilarious adventures with "the girl back home", and her letters buoy up his spirits in difficult times. John must struggle to overcome language barriers, physical hardship and deep-rooted suspicion to earn the trust and love of the Tongan people he has come to serve. Throughout his adventure-filled three years on the islands, he discovers friends and wisdom in the most unlikely places. John H. Groberg's Tongan odyssey will change his life forever.

When a storm washes a canoe bearing an infant boy ashore upon a small South Pacific island, he is at first well-received as a gift from the heavens, even to the point of the tribal chief adopting him as a successor. However, with time as hardships are blamed upon Tama (as he is named), he is finally outcast to live with the poorest people on the island, Mahana and her drunken father. Mahana is considered homely and undesirable, but Tama feels differently, so when he is old enough to build a craft to sail away, he vows to return for her one day. A lucky stroke brings him to land upon the island of the legendary Johnny Lingo, the wealthiest trader in the islands, and after years of service to him, Tama has learned much about life and himself as he dreams of honoring his pledge to Mahana.