Journalist Sang-jin uncovers the existence of the so-called 'Troll Factory' while investigating an online public sentiment manipulation story, and is confronted with an unbelievable truth.
2014
1986
1963
1974
1996
1941
2019
1962
2016
1978
2007
1937
1993
1992
2017
2020
2018
1927
