In this, the third Detective Inspector Chen novel, Chen and Zhu are given a major assignment to escort an emissary from heaven on a diplomatic mission to hell. Zhu tries to dodge his demonic family's overtures, but ends up embroiled in hell's political intrigues. At the same time, a young boy born to ghostly parents in Hell is sent to live with his grandmother in Singapore Three. The boy, Precious Dragon, is being chased by Hell's most dangerous creatures and ends up being the key to unlock the mystery that is quickly spiraling out of control. Chen and Zhu find themselves in the middle of a struggle much bigger then they can fully comprehend, and when the dust finally settles, neither heaven nor hell will be the same.