Chen Mo, an architectural genius who firmly believes that "everything can be quantified", was forced to take over the used bookstore left by his grandfather due to bad news. He thought it was just a troublesome funeral incident, but unexpectedly found a city map drawn by his grandfather himself, with ominous "red circles" marked with cinnabar.
Each red circle corresponds to a strange case that cannot be explained by science. When "architectural psychology" encounters "feng shui evil situation", and when the data model confronts "the sorcery of victory", Chen Mo's worldview collapsed.
In order to track down the true cause of his grandfather's death, he formed a temporary alliance with the Taoist Master Qin Feng, the Taoist King, and Lin Wan, the sassy policewoman, to use science to deconstruct metaphysics and logic to fight the curse. Step by step, they uncovered the dark context beneath the city's glamorous appearance, only to discover that they were being targeted for elimination by a mysterious organization called "Tianheng Division."
What kind of shocking secret does grandpa's codename "Observer 73" hide? This hunting game with the entire city as a chessboard has just begun...
