She also tells him about a letter that was sent to her about the Inferno portion of the plan. Sienna betrays Langdon and tells him that she was his girlfriend at the time before his death. However, knowing that Zobrist had set the date to when the virus was to be released, it couldn't ever be stopped. Their quest takes them to a set of clues which brings them to Venice and then it was discovered that the last clue was in Istanbul which gave them evidence that a virus was to be unleashed upon the world. She later discovers along with Langdon that he was the one who stole Dante Alighieri's Inferno mask which was once a belonging to a man named Bertrand Zobrist. Marconi on her path to killing Langdon, Sienna fled the hospital with Langdon. When another agent for the Consortium named Vayentha comes in and supposedly killed Brooks' partner Dr. Sienna is first introduced when she begins some medical work on Robert Langdon who was in a coma due to him having amnesia when he wakes up in her hospital room. She took up acting and medical school to "become a different person". This left a permanent impact on her, and she never spoke of it again when she returned to America. When she went on a missionary trip to a Philippines shantytown, Sienna was almost raped by three men before being able to escape. When she went to see a psychologist about it, he suggested that she focused on solving the problems of the world. With an IQ of 208, she was bullied by her peers and entered a state of depression. She became a child prodigy, polyglot, and musician all by the age of 7. Sienna Brooks was born into an American family in 1980.