On that day when the demon king attached the human word the five sects leaders non of them can stop him because he was so powerful and their was a saying a twin siblings a boy and a girl should sacrifice themselves and creat a sword and that sword is said to be very powerful the two sword combined together can destroy the world and also save the world after the man said it the two siblings standing their deside to give it a try .the next day their sacrifice themselves and the sword was created and the five sects fight together and captured the demon Mo xuanming the leader of qi realm said their should lock him up and not kill him and the other sect leaders said their should kill him but Du wan the king deside let them lock him up that was how the demon was captured then the sword went missing 500 years later the red sword entered a new born on the acient world and the blue one entered a girl on the human world read to see their faith