Pearl and A Ping, who are in love, are waiting for the birth of their first baby. The seemingly peaceful suburban life was destroyed by A Ping's aunt's class.

Pearl has always been deeply curious about her aunt's seclusion and the strange arrangement of her room. A week before the due date, the class that suddenly appeared said to Pearl in horror: Don't be afraid, don't be afraid ... Auntie class burned herself to death at night. Pei was frightened by witnessing the tragic death of her aunt and gave birth to her first child prematurely.

Although the premature baby is a healthy baby boy, it is puzzling that the baby boy always cries for no reason. After the doctor's diagnosis, it is believed that the baby boy suffers from abdominal cramps, which is a common disease of newborns. The cause of abdominal cramps is hard to say, but it usually returns to normal in three to five months.

Months passed and the baby boy didn't get better. At the same time, once he cries, an uncontrollable terrorist event will happen. The relatives who died one after another oppressed Pearl and Ah Ping, unable to stop their son from crying, but watching them cry and destroying them. ...