Assigned to oversee the construction of the Ugandan Railway in the early 20th century, engineer Bob Hayward (Robert Stack) had enough challenges from the elements before a pair of man-eating lions began to prey upon his crew. When big game hunters from Britain were unable to confront the beasts and live, Hayward found himself fighting for the survival of himself and his wife (Barbara Britton). The spark that lit the era's 3D film craze co-stars Nigel Bruce, Ramsay Hill; Arch Oboler wrote and directed. 79 min. Widescreen; Soundtrack: English.