A spider fiend, whose body is decaying, forces a mortal named Jasper into a desperate pact: lure Ivy, a serpent with a powerful beauty core, within three days or succumb to deadly spider venom that will turn him to rotting flesh. Meanwhile, after a severe storm, the local monastery narrowly survives thanks to Jasper's donation, but Jasper and another man, Lucien, have mysteriously disappeared. Villagers notice the land's energy growing unstable, suggesting a looming threat tied to Jasper’s dangerous mission and Ivy’s fading control over her core.