When your life is controlled by a dark past and an endless taste of revenge, there isn't much you can do beside becoming the living puppet of your merciless karma. Jiyong knew this better than anyone. For the last 10 years he prepared himself to become Jaejoong's bodyguard and revenge his parents.

Seulgi had a perfect life until her father, the first  prosecutor of the country, started to receive death notes. During one stormy night, Junsu and his wife were killed without mercy, in front of their daughter, who was hiding behind a decorative wall.