Yan Yangyi and Bao Hulu strayed into the strange Underworld Town, where they can only enter but cannot leave. Anyone who leaves without authorization will die mysteriously. Although Yan Yangyi doesn't believe in the horror legends all over Yin-Yang Town, he frequently encounters strange things. Will he be able to survive time after time? What was even more unexpected to Yan Yangyi and Bao Hulu was that under the curse, the spooky town has an amazing secret behind it......

In the mysterious Lop Nur region, all kinds of bizarre supernatural and bizarre incidents occur frequently. The local mysterious incident investigation organization "Seven Children Club" has launched an investigation on these mysterious incidents. Shi Chuqi, the president of "Seven Children Club", leads the groups members to solve the mystery and finally find the truth....