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?
