1994년, 사이비 종교와 싸우던 한 남자가 살해당했다. 아버지를 잃은 세 아들은 각자 신학자, 이단상담가, 성공회 신부가 되어 아버지의 싸움을 이어갔지만, 30년이 지나도록 그 죽음의 진짜 배후를 밝히지 못했다. 과연 그 진실은 무엇인가.
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?