As the sun sets on the hill, and the temperature plunges to 30 degrees below zero, Barber's men dig in for the night. At two in the morning they are awakened by the sound - bugles, whistles, cymbals, and drumbeats - of a massive assault by thousands of enemy infantry. The attack is just the first wave of four days and five nights of nearly continuous Chinese attempts to take Fox Hill, during which Barber's beleaguered company clings to the high ground and allows the First Marine Division to battle south. Amid the relentless violence, three-quarters of Fox Company's Marines are killed, wounded, or captured. Just when it looks like the outfit will be overrun, Lieutenant Colonel Raymond Davis, a fearless Marine officer who is fighting south from Chosin, volunteers to lead a force of 500 men on a daring mission that cuts a hole in the Chinese lines and relieves the men of Fox Company.