Saavu Koothu is a story of a 10-year-old, an optimistic and spirited boy from a poor family in Chennai who dreams about owning a bicycle. An unexpected visit from a rich uncle during Diwali sets the wheels in the boy’s mind turning. Determined to get himself a bicycle, the boy comes to an agreement with his uncle, the fulfilment of which along with his struggles, highlights the innocence of the child. The film also tries to capture the detailed essence of the culturally rich city of Chennai, which is also very modern at the same time. The style of the film is a combination of 2D and 3D animation.