When Detective Sing investigated the serial murder case, he discovered that the victims were related to the cult ritual of "decapitating the head to sacrifice the baby". The dolls in the ritual were entangled with red threads and had their heads broken, suggesting that the case involved supernatural forces.

Paranormal consultant Thup revealed: "The controlled souls usually only seek merit, but these souls are obviously under the instructions of others," pointing to the existence of dark warlocks behind the scenes.

Sing's rational thinking continues to conflict with Thup's psychic abilities, but the two are forced to cooperate.Thup used the experience of a "former monastery child monk" to analyze the ritual, saying that "those who control the souls of the dead will never stop", while Sing, although skeptical, gradually accepted supernatural explanations.

The rekindling of the old relationship between the new characters forensic doctor Darin and Dr. Sey is unfolding, injecting an emotional branch into the hard-core detective drama.

The legend of the "Blood-Red Heroic Spirit" was mentioned for the first time, and it matched the shape of the wounds on the seven corpses, suggesting that the ancient curse may intervene in reality.

The setting of the villain controlling the souls of the dead through the "ghost-calling talisman" echoes the tradition of folk witchcraft in Southeast Asia and enhances the regional characteristics of the series.