A romantic drama about what happens when young and successful CEO Ma In Tak offers to pass on a 10 billion won inheritance to his future wife.

Prosecutor Min Tae Yeon (Yun Jung Hoon) is bitten by somebody and becomes a Vampire. Tae Yeon rejects the life of a vampire and he survives by drinking the blood of dead people and still lives as a righteous prosecutor. Tae Yeon also uses his new founded abilities as a Vampire to prosecute powerful persons normally thought above the law. A mysterious case then occurs and the evidence points to a Vampire as the perpetrator. Tae Yeon now knows that he is not the only Vampire. He also ponders why he became a Vampire and what truths may lie behind their motives.

The drama will be about two men whose fates are crossed from the very first day that they were born. Both men were born in the same hospital. When he was a teenager, Lee Dong Chul witnessed the death of his father. From then on he promised to seek revenge on the man who caused his father's death, Shin Tae Hwan. But unbeknownst to everybody is the fact that Dong Chul's younger brother, Dong Wook, was switched at birth with Tae Hwan's son, Myung Hun. Dong Wook grows up to become a prosecutor and vows to help his brother seek revenge. But what happens when they find out that they're not brothers? What will Dong Chul do when he finds out that his real brother was raised by Shin Tae Hwan and that the brother that was beside him all these years is the son of his enemy?