Kabeer, got infected by a witch, gets converted into a vampire. His blood becomes black and now he needs to refill his black blood to stay alive.

Kabeer, a 28 year old guy, got infected by a witch, gets converted into a vampire. His blood becomes black and he needs to refill his black blood, so he kills his girlfriends, One after another. With a ritual, in 13 days red blood converts into black. He waits for 13 days then he kills.