A true story of dedication to sharing the Gospel and bringing written language to an isolated community. This is part of the story of George and Helen Hart, missionaries and language translators, who worked during the last half of the 20th century in Peru, specifically with the Chayahuita people group (now known as Shawi), to preserve their language in written form, and to translate the Bible into their language as well as make writing their language accessible to those within an outside their community. "Not In Vain" presents the answers to two basic questions. One is: "what was God's purpose for George and Helen Hart?" The other: "how did God fulfill that purpose in their lives?" This biography contains interviews from those who worked with the Hart family, as well as family members themselves, and focuses on what God did through these, and the many people their lives touched.