The duo investigates a blackmail scandal involving a famous politician in Bihar. Bhaskarvilla:

Rasika Dugal plays a graceful sitar-playing seductress who matches Shekhar's wit.

The series adapts original screenplays by , which are inspired by Arthur Conan Doyle’s characters but do not directly copy the famous stories. For example:

The series revolves around the life of Shekhar Home, a renowned Indian police officer who has solved some of the country's most complex cases. As he navigates his personal and professional life, he finds himself entangled in a web of mystery and suspense. The story takes a dramatic turn when Shekhar Home starts to unravel a sinister plot that threatens the very fabric of society.

The finale ends with a title card: "Shekhar Home will return in The Sign of Four – A Bengali Adaptation." Given the moderate success and low production cost (period props, no VFX-heavy action), a Season 2 is highly likely. However, the makers will need to raise the stakes—perhaps move to Calcutta (Kolkata) and introduce a true criminal mastermind.

Shekhar Home (Kay Kay Menon): Kay Kay Menon delivers a masterclass in understated acting. He portrays Shekhar not as a superhero, but as a man burdened by his own intelligence. His Shekhar is quirky, socially awkward, and deeply observant. Menon brings a vulnerability to the character that makes him relatable to the Indian audience.