Cissa, a disobedient young vampire who sucked human blood, successfully escaped from the castle and came to a small town where humans live. He met a beautiful human woman. He wanted to tease her but was caught and imprisoned by blood hunter Kaisen. The moment before he was killed by Kaisen, the memory in Cissa's mind was read by Kaisen. Kaisen knew that Cissa was a good vampire and did not kill him. Later, Cissa was curious about Kaison's life as a blood hunter and embarked on a journey to hunt vampires with him.