Pratik Chowdhury

Several interested parties search for the house of a scientist who lived 150 years ago, believing that it contains his mysterious invention. A young boy is named the heir to the scientist’s house. Hidden in an underground chamber beneath the house is a strange musical instrument capable of putting anyone who hears it to sleep for several years. Among those seeking the instrument is also an alien from another world who has come to Earth specifically to obtain it.

Pupul is twelve years old. But, instead of studying and playing like other twelve year old, the only thing that interests him is solving cases. His two friends, Tatai and Bhebli, are equally enthusiastic on being sleuths and assisting Pupul. Pupul calls himself Captain Spark , roams around with a toy pistol and dreams of possessing a durbin (binocular), which, according to him, will make him a real detective. So when his uncle presents him one on his birthday, disaster strikes. Looking through the durbin, Pupul witnesses a murder and decides to catch the culprit.