Set in Peru, an American engineer (John Wayne) is hired by a wealthy industrialist (Cedric Hardwicke) to build a tunnel through the Andes mountains. The two men are in conflict over the methods of building the tunnel which creates tension. That tension is increased when the engineer falls in love with the industrialist's daughter (Laraine Day). Based on the 1934 novel by C.E. Scoggins and directed by Richard Wallace. At over a two hours running time, the film can't sustain either the drama or the tension necessary to keep the viewer involved. Handsomely shot in three strip Techinicolor with Lone Pine and Arcadia, both in California, standing in for Peru. For a change, Wayne has a role where he isn't the "hero". In fact, for a large portion of the film, he's a stubborn jerk. The supporting cast doesn't amount to much, even a great actress like Judith Anderson is saddled with a nothing role. This is for Wayne fans only! With Anthony Quinn, James Gleason, Paul Fix and Ann Codee.