Secrets of the Boundless: A Heartbreaking Pact Between Gods and Man, and a Terrifying Scheme Unsolved for Millennia

To uncover the truth behind a bizarre plane crash, Lin Lang conceals his identity and joins an oceanographic research vessel, planning to travel with the crew to the site of the disaster. But on a rainy night, catastrophe strikes without warning. The ship is destroyed, and everyone aboard is lost... The survivors, Lin Lang and Engineer Zhou, stumble upon a diary. Its contents seem connected to the Black Jade Dragon Tail. To get to the truth, they decide to follow this lead.

As the truth gradually comes to light, so does a plot laid centuries ago. Everyone and everything caught up in it includes the inscrutable Mr. Su, the money-mad master of Liaofeng Island, a mad old man of unknown origins, a golden city stretching for thousands of miles beneath the sea, and the eerie, terrifying "Bottomless Underworld"... In the end, all clues seem to point toward an ancient secret realm hidden in the Great Snow Mountains.