Zheng Ziyi (Angelica Lee), who runs a small garment workshop, has been troubled by strange dreams for some time. She often dreams of a desolate wilderness, in which she intuitively feels that there is a body buried underground; she also dreams of a broken red phone and a female police officer who comes to investigate. Ziyi looks for a solution everywhere, but the situation has not improved, but has become worse. The disappearance of her ex-husband Ming (Kenny Wong) makes her suspect that she has become the murderer while sleepwalking. On the other hand, a woman named Biqi (Charlie Yeung) has her son kidnapped, and although the ransom is paid, his whereabouts are still unknown. Her cousin (Huo Siyan), who is a police officer, is responsible for investigating the matter, but there has been no progress. Ming's disappearance links Ziyi and the female police officer together. Their meeting reveals Ziyi's past full of sadness and darkness, and also leads this series of disappearances to an unknown direction...