The petitioners (defendants 1 and 2 in the original suit), who are the parents of the plaintiff, filed a Civil Revision Petition before the Andhra Pradesh High Court at Amaravati challenging the trial court's dismissal of their application to reject the plaint in O.S. No. 263 of 2018. The plaintiff (their son) had filed a partition suit claiming one-fifth share in properties described as self-acquired properties of his deceased grandparents, who died intestate in 2007. The petitioners argued that under Sections 8 and 15 of the Hindu Succession Act, 1956, the property devolved upon the grandparents' immediate Class-I heirs (i.e., defendant no. 1 as son and defendant no. 3 as daughter), and that a grandson has no independent birthright or coparcenary interest in such self-acquired/inherited property during the lifetime of his father. The High Court examined the plaint averments and the settled legal position, including the Supreme Court's ruling in Commissioner of Wealth Tax, Kanpur v. Chander Sen and Uttam v. Saubhag Singh, that property devolving under Section 8 of the Hindu Succession Act is held as separate individual property with no birthright accruing to the heir's son. The judgment text as provided ends mid-analysis, so the final operative order is not fully captured in the supplied text.