In Paris, many citizens go to the precinct after the doors of their apartments have been sprayed with a 4 and the letters "clt". When a dweller is found mysteriously dead in his apartment, Detective Jean-Baptiste Adamsberg and his partner Danglard investigate...
For months a strange phrase has been found scrawled on Paris sidewalks next to chalk circles containing odd objects. Policeman Adamsberg gets involved when a dead woman is found in one of the circles.
After three elderly men are bitten by spiders, everyone assumes that their deaths are tragic accidents. But at police headquarters in Paris, Inspector Adamsberg begins to suspect that the case is far more complex than first appears.
