Operation Chromite

North Korean forces' surprise invasion of the South on June 25, 1950, marked the start of the Korean War. The capital Seoul fell in just 3 days, and within 40 days, North Korean forces gained control of almost the entire country. General MacArthur, the Commander-in-Chief of the United Nations forces, plans to strike back targeting the North Korean forces' blind spot, with a large scale amphibious operation. In order to gather intelligence, he dispatches a military intelligence unit consisting of special operatives who are given no service numbers, on a classified undercover mission. A naval lieutenant, JANG Hak-soo and his corpsmen successfully infiltrate into the North Korean army disguised as enemy soldiers and carry out their intelligence-gathering mission but a North Korean commanding officer in charge of Incheon Defense Territory, LIM Gye-jin turns a suspicious eye on them. A hidden story of special military operatives with no service numbers who changed the tide of war, their history-changing mission begins.