The three follow the riddle across Venice but Ferris suddenly collapses unconscious due to internal bleeding caused by an infection. He has a severe rash on his face but hides it from Robert and Sienna by covering himself with his jacket collar. Jonathan Ferris shows up saying he is from the World Health Organization (WHO) and has come to help them escape the soldiers. Sienna explains that Zobrist advocated for a halt to humanity’s growth due to overpopulation issues he was rumored to be working on an engineered disease as well using his genetic expertise. Bertrand Zobrist is a billionaire geneticist who previously owned that mask at Florence’s Baptistery. Robert and Sienna spent a significant amount of time in Venice before this event occurred, so now they have possession of Dante’s Death Mask with a mysterious riddle on it. They must sneak carefully through the city in order to avoid them. However, they’re intercepted by Venice police and soldiers. Robert and Sienna head towards the Old City, where they believe they might find out more about the cylinder and its connection to Dante.
In order to avoid getting caught by Vayentha and her fellow soldiers that were about to break down their door they escape from the apartment building via an elevator shaft where they meet up with Professor Sinskey who tells them that she has discovered more clues regarding what might be happening around them all while also explaining how it relates back to Dante’s Inferno. Vayentha, an assassin who had been following Robert Langdon since the beginning of the novel (and has been observing his actions through hidden cameras) breaks into the hospital and shoots one of her colleagues before trying to kill Robert as well however she misses due to Sienna’s interference. Sienna Brooks, one of his doctors, says he stumbled into emergency after being grazed by a bullet, which gave him a concussion. He was at Harvard, but now he realises he is in Florence.
Professor Robert Langdon wakes up in a hospital bed with a head wound and cannot remember anything. It was number one on the New York Times Best Seller list for hardcover fiction and combined print &e-book fiction for eleven weeks of its release. Inferno is a mystery thriller by Dan Brown and the fourth book in the Robert Langdon series. 1-Page Summary of Inferno Overall Summary