In a remote, ancient castle, a group of friends and occult enthusiasts gather to conduct a series of dark rituals aimed at resurrecting the spirit of a witch, Isabella, who was executed centuries earlier. The patriarch of the group, a charismatic yet enigmatic figure, leads the ceremonies with fervor, driven by his obsession with the arcane. Meanwhile, a young woman named Margaret begins experiencing strange visions and unexplainable phenomena that seem to connect her to Isabella's tortured past. As the rituals progress, the line between reality and the supernatural becomes increasingly blurred, raising the stakes for everyone involved.

Unspeakable horrors soon begin to unfold within the castle walls. Margaret finds herself drawn deeper into the dark history that binds her to Isabella, struggling to understand her role in the unfolding events and battling her mounting terror. The friends' obsession with their macabre quest breeds distrust and paranoia, leading to violent confrontations and frantic searches for answers. Amid the chaos, secrets about the castle and the true nature of the rituals come to light, revealing a perilous and sinister truth. The escalating dread drives the group towards a climactic face-off with forces beyond their comprehension.