غزو الأرواح الشريرة، وعبيدي من مستوى لا يقهر

A man is thrown into a world haunted by deadly ghosts. He gains a system that lets him bind and upgrade powerful ghost servants. As he fights against hidden schemes and a mysterious cult, he uncovers shocking truths. The ghosts come from another world and this reality is the realm of the dead. What will he do to rebuild the order of this realm?