We follow British scientist Ronald Ross as he stops a cholera outbreak in Bangalore in 1895. At first he’s stumped. The disease shows up in one place and then jumps to the other end of town. And how to get his hands on a microscope when there’s only one in all of South India? Join Sanjeev Jain, a professor at NIMHANS, for a “whodunnit” on Ross’ disease-hunting trail.