Souryam revolves around Vijay (Gopichand), who comes to Kolkata in search of his lost sister (Poonam Kaur). Though he finds his sister, he conceals his identity, fearing that she may hate him. Why? When his father died, Vijay had abandoned her hoping that she would be better off in an orphanage rather than living with him in penury. It leaves a scar on her mind and she starts hating her brother.
In Kolkata, Vijay meets a naughty college student Swetha (Anushka) and soon romance blossoms between them. In the meantime, Vijay is being chased by Sivarama Krishna Goud (Manoj K. Jayan), a Hyderabad don. The link between Goud and Vijay is told in a flashback. How Vijay wins his sister's love and saves her from the hands of Goud forms the rest of the plot.
The film has music by Mani Sharma, cinematography by Vetri and editing by Marthand K. Venkatesh. Story and screenplay are handled by the director himself. Also in the cast are Ajay, Ali, M.S. Narayana and Krishna Bhagawan.