Undercover (2021)

Han Jung Hyun is an agent working at the Agency for National Security Planning and has always been known for his excellent skills and extraordinary quickness. He is living under a hidden identity when during one mission, he falls in love with Choi Yeon Soo and gets married to her after some time. Jung Hyun now lives his life as an husband and a father of two lovely children. However, the secrets of his past resurfaced when his wife becomes nominated for a high-ranking government position. This could possibly break apart his beloved family.