Ponniyin Selvan: II

Spoiler-free synopsis

A flashback chronicles the childhood romance between Aditha Karikalan and Nandini in Pazhayarai. Despite their deep bond, Karikalan's sister, Kundavai, and their grand-aunt, Sembiyan Madevi, forcefully expel the low-born Nandini from the kingdom during Karikalan's military deployment. Devastated upon his return, Karikalan learns that Nandini has sought refuge under the rival Pandya king, Veerapandiyan, establishing her lifelong vendetta against the Chola dynasty. In the current timeline, the presumed drowning of Prince Arulmozhi Varman throws the Chola Empire into deep mourning. Sensing an opportunity, the vengeful Nandini manipulates the smitten Chola chieftain Parthibendran Pallavan into diverting Crown Prince Karikalan to a trap at Kadambur Palace. Concurrently, the fanatical Pandya Abathudavigal assassins pursue the surviving royal lineage. In reality, a frail Arulmozhi Varman has survived the ocean storm but is incapacitated by a severe shipboard fever. He is clandestinely escorted to a Buddhist monastery in Nagapattinam by Vallavaraiyan Vandiyadevan, Poonguzhali, and the Vaishnavite spy Azhwarkadiyan Nambi. While running a distraction to throw off the pursuing Pandya assassins, Vandiyadevan is captured. In prison, he overhears Nandini planning Karikalan's assassination, but he buys his freedom by revealing that he witnessed Oomai Rani, the mute, mystical lookalike of Nandini, acting as Arulmozhi's silent protector. Nambi subsequently rescues Vandiyadevan, who rushes to warn Kundavai. Kundavai and Karikalan converge at Nagapattinam, where Arulmozhi is convalescing. Although Vandiyadevan warns Karikalan of the trap awaiting him in Kadambur, the arrogant Crown Prince dismisses the threat. Meanwhile, Arulmozhi reveals the striking physical resemblance between Oomai Rani and Nandini. This prompts a suspicious Kundavai to confront her father, Emperor Sundara Chola, in Thanjavur. The bedridden Emperor confesses his past romance in Lanka with Mandakini Devi (the Mute Queen). Meanwhile, internal rebellions fracture the capital; the ambitious Prince Madhurantakan allies with the rival Rashtrakuta dynasty to claim the regency. However, the unexpected arrival of a recovered Arulmozhi Varman and his prospective bride, Vaanathi, defuses the warring domestic factions and restores peace to the Thanjavur fort. Karikalan arrives at Kadambur Palace, where the conspirators propose partitioning the empire to appease Madhurantakan. Seeking only his siblings' safety, Karikalan shocks the council by offering to abdicate his claim and surrender the entire domain to Madhurantakan, provided he retains control of the military. The council agrees, and finance minister Periya Pazhuvettaraiyar departs for Thanjavur to finalize the treaty. En route, he learns from a local rower that the Pandyas have breached Kadambur via subterranean tunnels to assassinate Karikalan. Periya Pazhuvettaraiyar and a arriving Vandiyadevan rush back to intervene, but both are knocked unconscious by the infiltrators. Simultaneously, the assassins infiltrate Thanjavur, where Mandakini shields Emperor Sundara Chola from a fatal arrow, sacrificing her life just before Arulmozhi Varman arrives to decimate the remaining infiltrators. In the secluded chambers of Kadambur, Karikalan confronts a conflicted Nandini. Recognizing her internal struggle between her past love and her sworn vengeance, a guilt-ridden Karikalan confesses that the agony of their separation outweighs his desire to live.