Ordinary citizens suddenly experience violent and horrifying hallucinations, leading to chaos and danger. Sensing a supernatural cause, Batman seeks help from John Constantine, a knowledgeable occult detective. Together with Zatanna, Deadman, and Jason Blood/Etrigan, they form a team to investigate the mysterious events and confront the dark forces behind them. As they delve deeper, they uncover clues pointing to an ancient and powerful sorcery threatening to destroy the world.

The team visits various mystical sites and battles demonic entities to gather information about the escalating chaos. Constantine's expertise in dark arts proves crucial, while Zatanna's magical prowess provides vital support. Deadman's ghostly abilities and Jason Blood's transformation into the demon Etrigan add necessary muscle to the team's endeavors. Along the way, they encounter unforeseen challenges and powerful adversaries that test their resolve and unity. With every step, the mystery grows more complex, unveiling a greater threat than they ever anticipated.