Since ancient times, stories have circulated among the people about mysterious entities. Snake, Centipede, Toad, Lizard, and Scorpion. These five beings, known as the Five Venoms (O-dok), are monsters living in human form.

Their world follows a simple yet brutal order: the stronger venom survives. It is their natural way of life to be wary of one another, sometimes devouring each other to prove their power. However, not all of the Five Venoms walk the same path. Some view humans as mere prey, while others begin to obsess over a specific human for no apparent reason. Whether it is emotion or instinct is unknown, but once entangled, the bond is never easily broken.