Kairos, an agent of the Security Bureau, has a ruthless style of handling cases that makes people frightened. He is a single mother and a living hell, but he is controlled by his father and only obeys his father's orders. His father is a candidate for the next president, and helping his father to be successfully elected is his greatest honor.
During a mission, Kairos picked up Eureka, the heir to a large arms family who had lost his memory. Because he controlled the majority of votes and directly determined the outcome of the election, Kairos decided to take advantage of his amnesia to cheat him out of his votes. He deceived and used him, but unexpectedly, he fell in love with him accidentally. He was completely cured of his father-control problem and stopped listening to the words of his presidential father. Just when he was in love to death, Eureka's memory recovered. It was over. The hypocrisy of the father and son was stripped off. They offended the arms boss Eureka who was determined to retaliate. They had to shed their skin even if they didn't die. However, Kairos, who had tasted the taste of love, no longer cared about life or death and just wanted to get Eureka back.
Eureka, the head of the Winton family and a law-abiding arms dealer, was framed and lost his memory, and became an arms smuggler wanted across the country. Fortunately, Kairos and his son were around to help him clear his suspicions and return home. In response to the hostile forces, Eureka helped Kairos' father to be successfully elected, and she also exchanged feelings with Kairos. But accidentally discovered that the father and son were not frank and good people.
At the critical moment, Eureka's memory was restored, she switched back to the tuba, and all the puzzles were solved. Kairos deceived him for votes and feelings. This time he wanted to torture him severely, but after torture, he found that he still loved him.
Purpose: Sincerity is the cornerstone of love