Olu is the tale of a girl who gets gang raped and sunk to the bottom of the backwaters where she can mysteriously survive and live for the next nine months -until she delivers her ‘baby from rape’.
Vijay and Pournami are two very different sort of people who first meet because of a misunderstanding. Vijay is a lazy engineering graduate unwilling to follow his passions and Pournami is an unlucky bold girl who doesn't give up on her dreams. They don't seem to find a lot of things in common at first; but as time passes more avenues open up for them to collaborate and learn from each other.
Set against the backdrop of World War 2, the film spans over three different phases of the life of the protagonist Kammaran who gets inspired by freedom fighter Subhash Chandra Bose and joins INA to secure Indian independence from British rule.