When three little girls of Burma Colony in the outskirts of Trivandrum were murdered in succession, and the body of another was discovered in a school bus, the police arrest the bus driver Ubaid Ahmed, but he is proven innocent as another victim is kidnapped, and murdered in the same manner while he is in custody. Ubaid is freed; and with no more leads the case dies down, as the killings cease altogether. Abdul Wahab concludes that the Burma Colony killer must still be around. He also reveals that, on retirement, he took the ostracized Ubaid as his driver. Yet another victim is snatched from the hospital under the very nose of the team, mounting pressure on them. Samuel correctly double-guesses a clever ruse in the form of a candy bar dropped in a dustbin in front of the hospital but is puzzled that the DNA prints in the inside wrapper match neither those of the victim nor those of the child-killer collected from the previous incidents.
