During the coldest winter on record, an EMP attack wipes out the nation's power and cripples the country.As the city spirals into lawless chaos, investigative journalist, twenty-six-year-old Cassandra Drews is forced onto the dangerous streets of Portland to begin the long walk to her parents' home in Oregon.

But hypothermia and starvation aren't the only dangers Cass and her rescue dog, Daisy, face on their perilous trek.

Danger is stalking them, waiting for the perfect moment to strike.

Help comes in the form of troubled ex-marine Isaac Winters, who slips back into soldier mode with the city's collapse.Now, the trio must work together in a fight for survival as they race to escape the city before violence, or the bitter wintry storm can claim them.

Do they have what it takes to make it out alive? Or will they be crushed by the brutality of the unforgiving cold?