Robert Langdon the historical scholar specializing in symbolism is being hounded by someone and he has to find out why. Robert Langdon wakes up in a hospital bed suffering from amnesia. A woman tries to kill him and he is saved by a doctor, Sienna. That is the beginning of his search for the people who are out to kill him.
He is plagued by visions of this beak nosed green eyed mask.
Sienna finds a canister which is a biotube in Robert's coat pocket. Activated by Robert's thumb the canister projects a horrifying picture of a under ground cave that has a plastic bag bolted to the floor underwater. It seems to contain some kind of a viscous liquid, probably virus to trigger an epidemic.
Robert finds links to Dante's Divine Comedy in all the messages projected by the canister and uses his knowledge of symbology to reach Venice where he believes he will find the cave.
The bag of virus has been planted by Bertrand Zobrist a brilliant biochemist and a Dante fanatic who was extremely concerned about population explosion and its effect on Earth.
Chased by the US police, the WHO, Robert finally realizes that the bag is not in Venice but in Turkey and that Sienna is also a part of the conspiracy.
He locates the exact place where the bag was bolted but by then the plastic of the bag had already dissolved and the virus had been released. Thankfully it was not a disease carrying virus but a population controlling one.
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