Xiao zhan is a black poisonous cobra spirit. He's vicious and kills without thinking twice. Having killed a lot of humans, no one dared approach his territory scared of a black cobra who bites anyone, his poison is just so lethal that you die within seconds. Xiao zhan lives around a waterfall, the place has cool temperatures, zhan loves living under the water most of the times, any human that disturbs his peace or come across the snake meets his doom. Zhan one day met a strange egg, being hungry, zhan gulped it down at a go.

Waking up the second day Xiao zhan found himself having legs and hands. In short he looks like those weird, annoying human beings. Zhan tried walking but failed, shifting back to his original form zhan slithered away.

One day zhan met an accident an annoying human being ran over him by a motorbike while he was crossing the road. He was about to die when a good samaritan attended to his wounds, he even carried him and placed him in a safe place telling him to be careful. Xiao zhan looked at the strange human being, getting his face saved perfectly well by his eyes, zhan slithered away not being able to kill a human. From that day zhan promised himself to find that human after he has healed, even if it means killing those annoying human beings.

Wang yibo loves animal since he was little, he has this obsession with different kinds of animals, but the animals that he has always feared are reptiles, especially snakes. But seeing about to die snake he decided to man up, wearing protective gears, yibo helped the snake, seeing the snake slithering away wang yibo ran away as fast as his legs could carry, arriving at his car, yibo drive away without looking, promising himself never to touch or bother with snakes.