The film tells the story of St. Thomas the Apostle who reached the Malabar Coast in AD 52 to spread the Gospel among the Jews and locals who are today known as Saint Thomas Christians or Nasranis. He eventually established the Ezharappallikal or Seven and Half Churches in Kerala. These churches are at Kodungallur, Palayoor, Kottakkavu (Paravur), Kokkamangalam, Niranam, Nilackal (Chayal), Kollam and Thiruvithamcode (half church). He became a martyr in AD 72, at St. Thomas Mount near Mylapore, Chennai.