The budget-minded "spectacular" Convoy was based on Song of the Dragon, a novel by John Taintor Foote. Lowell Sherman stars as a slick German spy during World War 1. Sherman matches wits with-and pitches woo to-American secret agent Dorothy Mackaill. Most of the footage is cosumed by newsreel and Signal Corps clips of actual World War 1 naval battles. Released by First National, Convoy was one of the first independent productions of the Halperin Brothers, of White Zombie fame. ~ Hal Erickson, Rovi