Four years ago, a terrible thing happened in Seoul... Judge Jeon, his wife, and their daughter were killed... The murder was flawless... The killer destroyed the family without a trace... The only survivor of the family was Mr. Jeon's eldest son... Jeon Jungkook... 28 years old and one of the most skilled security agents in Korea. After his family was killed, he started a mission to find the killer... For revenge... He had been searching for the killer for months... Kim Taehyung... A young boy who killed people for money... His brutal murders continued and the Korean police were in chaos, so Jungkook decided to take revenge himself... Jungkook approached Taehyung... He knew he was a smart boy, but love always makes people stupid... Jungkook approached Taehyung as a new neighbor. Every time they had random meetings that Jungkook had secretly planned and they started dating... Now, 10 months into their relationship It was happening...Jungkook collected a lot of evidence against Taehyung and Taehyung was finally arrested...But Jungkook's feelings had changed...Now he could no longer deny the love he was trying to hide under hatred.!