两对青年人开始攀登美国北部的白马山。不慎失落了保险绳，又面临这严寒的夜晚，一筹莫展。
David Janssen
Glencoe MacDonald
Tony Musante
Lt. Col. Harris Thatcher
Madge Sinclair
Dr. Pittman
Gretchen Corbett
Liz
James G. Richardson
Scott
Allison Argo
Kathy
Dorian Harewood
Lt. Zack Hawkins
Warren Stevens
MSgt. Lomax
Katherine Cannon
Sandy
James Canning
Lt. Foster
James Kaufman
Lt. Foley
Danny Chambers
Ranger Boyd
Byron Patt
Ranger Lawson
Jeffrey Prather
Tom
