Kim taehyung an 40 years old normal family guy with three kids. But he doesn't has a good relation with his family. He belongs to middle class family. He is cold and distant only speak when it is necessary. One day his younger son get the hold of his old dairy which he wrote in his teenager and early 20s. What looks like the normal and harmless dairy has hidden his deepest and darkest secrets. When his children read that dairy they were shocked to there core but decided to keep it a secret. At the last taehyung end up crossing the path of powerful and dangrous mafia. Whom he knows to well from his past. The problem is that mafia has left him in a past with a promise and that promise was . *Never show your face to me ever again. If you come in front of me again then i swear on our love that I will fucking ruin you*. What is written in that dairy? And what past does a mafia and a normal middle class men share with each other.? Read to find out..