 The management of a ski resort blatantly ignores a local expert s warning that a mass of snow has build up which is just waiting to come down the ski slopes in a terrible avalanche. Instead of clearing the endangered area, skiers are allowed to remain  for the rest of the day . Nature doesn t wait till after business hours, so the crystallized wave rushes down and crushes everything on its path, including a brand new hotel; among the guests is the architect Michael Cooper s own family, which now tries to remember the plans well enough to find the way out, as he tries to instruct the rescue operation above, where a second, even larger avalanche is expected.