James Dunn and Mae Clarke star as two lovers torn apart by Civil War strife in this black-and-white drama inspired by the real-life battle between a pair of legendary iron-clad warships -- the U.S.S. &NFi;Monitor&NFi_; and the U.S.S. &NFi;Merrimack.&NFi_; While Clarke's brother (David Manners) is fighting for the Confederacy aboard the &NFi;Merrimack,&NFi_; her beloved Dunn is serving the Union cause on the &NFi;Monitor.&NFi_; But where do her loyalties lie?