When a viral video indicates a dark secret behind a famous actor's apparent suicide, the Crime Investigation Department orders ASP Golam Mamun to reopen the case. But soon, he starts suffering from a dilemma - is it merely a suicide or a murder?

Mamun begins the investigation with Arman Rahman's childhood friend and producer, Faruk Hassan Banna. Meanwhile, the accused videographer Shanto's demeanour sparks Mamun's suspicion.

Mamun traces Arman's former wife, Sabina, to gather more details about the death and gets to know much more than he had expected. Mamun gets hold of Arman's old fling, Shabnam.

Plagued by personal problems, Arman became intolerant of the people. Desperate to seek justice, Arman's mother raises difficult questions in the media, which informs Mamun of a mysterious man named Khaled Shikdar.

The mysterious disappearance of Arman's manager raises many questions. When Rajib decides to help Mamun with unknown details of Arman, Rajib's daughter, Naima, gets to know about Mamun's sinister past.