Surviving the Arctic Cold with Family

A massive blizzard traps our bullet train. My venomous cousin tricks us out of supplies, leaves my parents to freeze, and I die. Reborn an hour before the accident, I hoard twelve boxed meals, fifty heat packs, and upgrade to a soft sleeper. In -50°C conditions, riots and avalanches strike, while my cousin conspires with burly men in a deadly pursuit. Can my family of three survive the twelve-day ordeal until rescue arrives?