Like thousands of ordinary families today, a young man named Khangai lives with his wife and child in a suburban district. He is a hardworking, good father, and a good husband, but suddenly, strange and incomprehensible events begin to occur in his life that he cannot understand. In the silence of the middle of the night, someone knocks on his door, sending shivers down his spine. The most surprising thing is that only Khangai can hear and feel all this horror. He thinks about what he has done wrong and finds no help. But how could he know that all this will eventually escalate and lead to the loss of his most beloved family. Will he be able to save his family?
In a remote corner of the world, a group of troubled youths finds themselves whisked away to a mysterious military base after a series of misbehaviors. Expecting little more than a stern reprimand, they are instead thrust into a world of secrets and shadows. In a desperate bid for freedom, they must unravel the mysteries of the base and confront the sinister forces that lurk in the shadows. But with time running out and danger lurking around every corner, the odds of survival grow slimmer by the minute. Courage, strength, and sacrifice, would they finally escape the clutches of the base and emerge from the darkness into the light?
Erick Ju, who is wanted internationally as a serious criminal, goes missing after undergoing a face-changing operation and using black magic to wipe his memories. Erick Ju and investigative journalist Heon Bin both find themselves in Ulaanbaatar. Not only does Heon Bin become a witness to a mysterious case, he also experiences unbelievable things in the underworld.