Journey with Tarsilinha

Jack Weber, a post-doctoral student on Hindu Vedantic Doctrine, meets a prostitute Swetha and eventually develops feelings for her. They set out on a journey to Kasi. In a parallel story, Sambaiah, an old man, requests his son Sivananda to take him on a pilgrimage to Kasi. What happens to the family of Sivananda? How is Swetha connected to Kasi?