Korea's first nuclear submarine and a crew with no record of existence embark on a do-or-die mission into the deep waters of the Pacific.

• Sidus
• Choi Min-soo
• Jung Woo-sung
• Yoon Joo-sang
• Son Byung-ho
• Go Dong-eop
• Kim Young-ho
• Sul Kyung-gu
• Jung Eun-pyo