Is Cult Hunter coming back?

In 1994, a man died while exposing a cult. Thirty years later, his three sons—a theologian, a counselor, and a priest—pursue his mission, confronting the hidden grip of cults in Korean society. As they sift through archives and testimonies, threats mount and the mystery of their father's death edges toward revelation. What really happened three decades ago, buried in faith, madness, and silence?