Super Thambi and the Riddle of the Runaway Rickshaw is a children's mystery story following the adventures of a young boy who solves puzzles and helps others. The story follows Thambi as he investigates the disappearance of a local rickshaw driver, who left a cryptic note leading Thambi to a hidden group of cinema enthusiasts struggling to keep their old projector running. Thambi's cleverness and sense of adventure ultimately lead him to not only solve the mystery but also help the group save their beloved projector.