Iris revolves against the 707th Special Mission Battalion recruited to a covert South Korean black ops agency known as the National Security Service. Of the group, recruit Kim Hyun-jun begins to uncover evidence his foggy past might perhaps well not be insignificant to his connecting of their company after all. As the two friends find their loyalties tested and forge new, unlikely alliances, the travel takes them where they find themselves at the middle of an international conspiracy.