The plot is set in Rajaraja Chola's period, who has been in power for around 16 years after Uttama chola.
The story revolves around Rajaraja's ambitious and visionary plan to build a big temple for Lord Shiva. The politics,economy and mindset of different sects of people about the temple are clearly explained. The enemies(Ravidasan's kins) conspire to take a revenge on Rajaraja for exiling their family.
Having read ponniyin selvan, one could find distinct differences in the portrayal of some of the characters. For instance, Aditya Karikalan is shown to be more ruthless than in PS. His death is explained from a different vantage point.
Brahmarayar and karuvur thevar are new main characters who were not there in Ponniyin selvan. I wonder how such prominent figures did not feature in PS.
The non linear narration of the events about karikalan, rajaraja's early life, Uttama chola's rule etc, made the story more interesting.