‘Jailer’ is Muthuvel Pandian, a retired jailer, enjoys a contented life with his wife, son, daughter-in-law, and grandson. However, when his son, an Assistant Commissioner of Police, disappears while probing the theft of temple idols, he is presumed dead. The narrative unfolds as Muthuvel Pandian takes on Varma, the mastermind behind a vast operation smuggling temple idols and treasures, seeking vengeance for his son’s fate.