Great Aunt Ella gives fourteen-year-old Brandon her rare edition of the Book of Mormon, expecting him to follow its teachings and keep it safe from the menacing thief who is determined to take it from her Iowa farm.

When Shauna, Jeff, Brandon, and Meg Andrews inadvertently stow away on a yacht carrying the creepy Dr. Anthony and his associates to Russia in search of the tribe the Andrews family met the previous year, they find hope and courage through prayer and the Book of Mormon.

When Mr. Omni invites the Andrews family to his southern California cottage to help solve a mystery connecting the original Mission Viejo to the Mormon Battalion, they find answers using the Book of Mormon.