First public release! Three stories of the independence movement unearthed after 100 years. Lee Yi-kyung, Han Seung-yeon, and Gwe-do, a trio of independence activist excavators, along with historian Choi Tae-sung, restore the reality of heroes we never knew through unreleased materials and various testimonies. Until independence was achieved, three K's fought for independence in different times and spaces. 'K' was always present in the most crucial moments of the independence movement. And a shocking secret revealed at the end! Who is the unknown independence activist, K?