Missionary John H. Groberg returns to Tonga in the 1960s with his wife and their five young daughters. When their sixth child is born with a serious illness, the Grobergs face their ultimate test of faith, only to find themselves surrounded by the love andprayers of thousands of Tongans. Barriers of inter-religious strife are soon broken down as all unite in hopes of a miracle that will save the baby's life, as well as the life of a Tongan minister's son.