Through a failed medical experiment, a priest is stricken with vampirism and is forced to abandon his ascetic ways.
Sang-hyun, a priest working for a hospital, selflessly volunteer for a secret vaccine development project intended to eradicate a deadly virus. However, the virus eventually takes over the priest. He nearly dies, but makes a miraculous recovery by an accidental tranfusion of vampire blood. He realizes his sole reason for living: the pleasures of the flesh.

 the priest Shangxian ( Song Kang-ho decorated ) , with fight to save the sacred beings desire to participate in a secret organization of the vaccine experiment , however , went to Africa , he was accidentally infected with the deadly virus . For the experiments carried out in the end , the doctor input to the brink of death Shangxian an unauthenticated plasma . Miraculously survived Shangxian weird bloodthirsty vampire Shangxian must avoid the sun , taking human blood for a living . In order not to kill , and only rely on ready-made plasma life-sustaining Shangxian has been careful to control their own desires, until friends strong -woo ( Shin Ha- decorated ) family met his wife baht ( Jinyu Bin decorated ) . Qiang Yu body is weak , and strong buildings mother ( Jin Haishu ornaments ) lead to excessive doting son she often "> discontent to vent to the head of baht baht suffered pain in my heart to see in the eyes of the Shangxian first glance deeply in love with this despair but stubborn woman .