After his wife's death professional bodyguard Lung Wei went overseas to find doctors for his daughter, but instead found a new job as a virtual reality tester.

Many years ago Mr. Six was a notorious gangster. That was back when there was still such a thing as honour among thieves, when criminals earned respect and maintained principles. These days Mr. Six is all but forgotten, a living relic residing in a narrow alley. One day Six's son, Xiaobo, is abducted by some spoiled punks after he scratches their precious Ferrari. Mr. Six realizes that he must do whatever it takes to get his son back — even if that means returning to the life he thought he had left behind.

Security expert Lu Zi Ming is hired to work at an oil and gas plant project bidding event. He is framed by several of the parties involved. In order to prove his innocence he must now devise the ultimate counter-attack.

The film is based on the legend of the Lake Tianchi Monster in Changbai Mountains. It tells about the scientific expedition led by Zhong Wenshan in 1955 to look for the strange disappearance of the water monster. There is an underground river connected to another mysterious place under the water. Every 24 years, the water level drops and the underwater hole will be exposed. For this reason, according to the guidance of Zhong's father's diary, everyone entered an untouched primitive jungle through the mysterious cave in the thick fog. There is no signal, the magnetic field is disordered, and the beautiful appearance is full of dangers. A deadly worm that lurks underground and cannibalize people at any time