This is all started when the president was being shot in his summer house however president Lee (Hyeon-joo Son) is not dead because he had gone before the shooting started. Agent HanTae Kyung (Park Yoo Chun) is from the secret service whose job is protecting the president, his father Han Ki Joon had killed in a car accident but officer Yoon Bo Won (Ha-seon Park) assured him that it wasn't accident instead his father is killed because of the secret document that he held at that time. Agent Han tried to find the missing president while solving the mystery behind his father's death with officer Yoon help because president Lee and many government officials also involve in this case.
Many tried to stop agent Han and officer Yoon to uncover the truth because of their own greed and tried to kill both of them since officer Yoon is also a witness, those who tried to kill and stop them including inside and outside the government.