This story is based on a Bengali family. Ramesh Das a 60 years man lived in a small place Jalpaiguri of West Bengal. He had four huge tea gardens and around 6000 people were working under him. His business was very vast. He was a respectable, bold, strong, and very powerful person. One day Ramesh Das had an accident. He realizes that he will not leave anymore. Before death, he wanted to tell his son about a secret which he hides for many years. His life was became changed after that incident which he has hidden for many years so he wants to confess. His son Pratap came from London to see his father. Ramesh Das indicating something by his finger down and told" last work of your……" but he unable to express. He wants to tell his son but unfortunately, he can't tell and died. How his father died? Police said that his father Mr. Ramesh Das was murdered and the family said that it was an accident. What was the secret of the locked room? Pratap got a clue from that room. With the help of that clue, he knows the secret. But what was the region behind the twins, what was the region behind the indication given by Ramesh Das before death, what was the region behind the locked room, and what past was about Ramesh Das? Is this all clue related to his death?