Swarnaja (Koel Mallick) is a hard-working do-gooder radio jockey with the rarest blood group in the world, Rh null blood group. She has been brought up by her grandmother. Her four year old son Pawrag is kidnapped by Shammo, an imposter.

While Ekendra Sen was enjoying his vacation in colourful Rajasthan with Bapi and Pramatha, suddenly a professor of archaeology at Oxford University, Shatadru Ghosh, informs Eken about his suspicion on a particular idol he had seen in London went missing. Eken begins his investigation with his two confidantes, where all the mystery facts will baffle him while constantly challenging his intelligence and observation skills. What happens when the situation gets out of hand after finding fake artefacts at the Jaisalmer Museum?