"The Greek and Roman demigods will have to cooperate in order to defeat the giants released by the Earth Mother, Gaea. Then they will have to sail together to the ancient land--Greece itself--to find the Doors of Death"-- Provided by publisher.
Although they have never gotten along well, seventeen-year-old Levi follows his older brother Boaz, an ex-Marine, on a walking trip from Boston to Washington, D.C. in hopes of learning why Boaz is completely withdrawn.