Robert Langdon, an expert on semiotics at Harvard University, wakes up from a hospital bed in Florence with a splitting headache and finds himself buried in pipes and a pile of medical equipment. He couldn't understand how he ended up in Italy when he was supposed to be on the campus of Harvard University. In the dream he vaguely remembered, a breathtakingly beautiful masked woman whispered to him across the churning river stained red with blood: Go search, and you will find...
Two doctors, the elder Marconi and the young Sienna, explained Robert Langdon's condition and described the circumstances that brought him here. At this moment, a woman in black suddenly broke into the intensive care unit and shot Marconi who tried to stop her without explanation. Sienna grabbed Robert Langdon and ran away.
