In order to find his missing father, police academy student Lin Shen strayed into "Tingsongju", an ancient house in the mountains, but was involved in the seven-night blood moon conspiracy. Every time the rotten-faced old man wearing a bamboo hat finishes telling a story about the "Seven Deadly Sins", the terrifying legend turns into a murder rule - the "Smiling Face" who needs to be dealt with in silence, and the "Sewing Ghost" who feeds on jealousy wake up one after another. He awakened the "Netherworld Eye" and the trick system, and cracked the rules amidst the suspicion of his teammates and the pursuit of trick objects, only to discover that the ancient house was an altar to awaken the ancient gods, and his father was actually the key sacrifice. When the blood moon rises and the wooden house turns into a maze of flesh and blood, he must lead his team to reverse the ritual in Cthulhu-style horror, and the truth behind the system is pushing him into a new death contract.
