Nam Sung-jin (남성진) is a South Korean actor. He is married to actress Kim Ji-yeong.
In 1782, King Jeong-jo of Joseon asks detective K to investigate a series of murders related to a case of corruption within the government.
A desperate 35 year-old Young-sil is more than ready for full time job. And finally she gets a call from National security department as an intern. But her joy lasts no long, soon asked to leave. Accidently she discovers a secret about her boss and she suggest a deal of full time job to help him; secret spy.
Set in a teahouse in Myeong-dong, Seoul right after the end of the Korean War, The 12th Suspect follows the suffocating psychological showdown that takes place between a detective and the 11 suspects who find themselves caught up in a murder case.