Randolph Scott, whom Cooper borrowed from Paramount, plays Leo Vincey, an explorer searching for the "flame of life," a radioactive element hidden in the Arctic parts of Manchuria which, according to Vincey family lore, can bestow eternal life. Setting out on the fearful journey along with British scientist Horace Holly (Nigel Bruce), Vincey is soon joined by Dugmore (Lumsden Hare), a brutish trader, and his daughter Tanya (Helen Mack). In the mountains north of the legendary civilization of Kor, where the...