Adventure streamer Wang Teng binds himself to an exploration system and sets out to livestream an expedition into Loch Ness with professional diving equipment. Following the system's instructions, he dives into an underwater cave and unexpectedly discovers an intact plesiosaur fossil, as well as a living prehistoric plesiosaur. Using the system's friendly signals, he averts danger and gently interacts with the two enormous creatures, even riding one through an underground crystal cavern. Chinese paleontology experts observe the discoveries through a live connection, while relevant national authorities coordinate with overseas counterparts to negotiate protective measures. Putting scientific conservation first, the protagonist calls for the establishment of a dedicated ecological reserve. By documenting rare footage of prehistoric creatures, he finally uncovers the truth behind the century-old legend of the Loch Ness Monster.