Beas Banerjee is intrigued when a national level swimmer dies of drowning in a local lake. She discusses the case with her friend Barun Sarkar, who is a cop, but he doesn’t find anything strange. Is Beas being overly suspicious, or is a heinous foul play indeed at work?

A few years ago, Dr. Soumitra Sengupta had conducted a drug trial, and some of the participants were found dead under mysterious circumstances. Is there any connection between the deaths that occurred then and now?

Three unusual deaths take place within 7 days, and Beas Banerjee finds a common symptom in all of them. All the deceased had Lymphoma. Beas starts probing the case. Has she just touched the tip of an iceberg?

Beas meets Ravikanth Agarwal, who is desperate to find the truth about the mysterious death of his wife, Dr. Indulekha Agarwal. Beas then gets to know about a list of 18 people out of which 17 are already dead. Is the 18th one the next victim?

As Beas meets Ravikanth Agarwal, the husband of a woman who died under mysterious circumstances, she comes across a list of 18 people, of which 17 are already dead. What will the fate of the 18th person on the list be?

Beas connects the dots and realises that all the victims with Lymphoma were patients who participated in a drug trial for blood cancer. She discovers that Lymphoma was a side-effect of the drug from that trial. But why is Dr. Sengupta denying it?

Beas and Saikat find a facility near Tajpur where a drug trial is still going on. They realise that this is an extension of the drug trial conducted two years ago. Meanwhile, Barun Sarkar, along with the two Chinese assassins, targets Beas and Saikat. Will they survive the attack?