A sudden blizzard traps a train deep in the mountains, leaving all passengers stranded in a freezing, desperate situation with no food or heating. Clara Sullivan unexpectedly reincarnates one hour before the disaster strikes. In her past life, she and her parents were schemed against by Yvonne Lowe, and eventually died from cold and starvation. Carrying deep-seated pain, she suppresses her hatred to plan carefully, stockpiles enough survival supplies in advance, and quietly moves her parents to the Soft Sleeper Compartment for safety. Facing repeated sabotage from her confidante Yvonne Lowe and predation from malicious strangers, Clara sets up traps step by step and calmly resolves every crisis. In the desperate situation, human nature is laid bare, and all wrongdoers suffer the consequences of their actions. She protects her family until rescue arrives, and ushers in a stable new life after surviving the disaster.
