Synopsis：In 1994, a man died under mysterious circumstances while exposing the dark reality of a dangerous cult. Three decades later, his three sons carry on his legacy in their own ways as a theologian, a cult counselor, and an Anglican priest. Together, they continue to track the sinister influence of cults still deeply embedded in Korean society. Yet, the truth behind their father's death remains shrouded in mystery. Now, as they navigate a trail of forgotten archives, buried testimonies, and persistent threats, the brothers are finally closing in on the long-hidden truth. What really happened 30 years ago, concealed beneath layers of faith, madness, and silence?