In an attempt to help his sister, who has cancer, fifteen-year-old Harry again enters Frost Cave to travel back in time, but takes a wrong turn and ends up in Jerusalem in 60 A.D., where the teachings of Christ have been twisted and war and lawlessness prevail, making Harry's task seem impossible.

Harry's enemies seek to separate him from all he holds dear, as Garth and Meagan are forced to make choices that could leave Harry permanently lost in Jerusalem during the first century A.D.

In 3000 B.C., threatened by the sword of Akish and the army of the Nephites, Mary, Becky, and Josh shelter a baby destined to become a great patriarch as Steffi is captured and taken to the Tower of Babel and Harry time-travels back to the battle between Akish and Gid.

Jim Hawkins walks side-by-side with the mortal Messiah; Joshua Plimpton, a chief captain of the Nephites, pursues the vilest villians to rescue the golden plates of the Book of Mormon; and, Apollus, Steffanie, Gidgiddonihah, and the rest of the "Tennis Shoes" clan, together with the prophets Mormon and Moroni, seek to outwit the teeth-gnashing forces of the Lamanites and Gadiantons as they converge upon the Hill Cumorah.