A volcano on Baekdu Mountain suddenly erupts. Pandemonium ensues on the Korean peninsula, with more eruptions predicted in the area.Government official Jeon Yoo-Kyung (Jeon Hye-Jin) finds Professor Kang Bong-Rae (Ma Dong-Seok), who studied Baekdu Mountain and warned of its possible eruptions for the past 3 years.
Nobody listened to him at the time. To prevent another disaster, the South Korean government plans an operation based on a theory by Professor Kang Bong-Rae. EOD (Explosive Ordnance Disposal) Caption Jo In-Chang (Ha Jung-Woo) is recruited to take part in the operation.
Because of a plane crash, only Jo In-Chang and his EOD team land safely in North Korea. His team must now carry out the entire operation by themselves.In a North Korean prison, Jo In-Chang locates Lee Joon-Pyeong (Lee Byung-Hun), who used to be part of the Ministry of People’s Armed Forces of North Korea. Meanwhile, Jo In-Chang’s wife Choi Ji-Young (Bae Suzy) is alone in Seoul and expecting a baby soon. She struggles to survives against the disaster.
为了阻止更大规模的灾难，地震学家姜奉莱（马东石 饰）提出一个避免白头山全面喷发的理论（逆转地壳法），要进入北朝鲜偷窃核子武器，去火山喷发地点利用核武在地底炸开引流，避免巨大灾难，交付由韩国军官赵仁昌（河正宇 饰）去执行，要到北朝鲜寻求间谍李俊平（李秉宪 饰）的协助，但李俊平原本一心只想拿核子武器卖给中国武器买家，拿钱就要逃跑，在这场灾难过程中间还有美国因政治协定，以及中国的武器买家，为了核子武器展开争夺，在赵仁昌妻子崔智英（裴秀智 饰）即将临盆，国家却交代这场任务，他几乎是无生还的机会……