1920 is a horror-thriller that follows the story of Arjun Singh Rathod (Rajneesh Duggal) and his wife, Lisa Singh Rathod (Adah Sharma). Arjun, the believer of Lord Hanuman, leaves his family and religion to marry a Christian girl, Lisa. The couple moves to an old mansion, where they notice eerie happenings. Arjun soon realizes that Lisa has been possessed by the demon so he seeks help from the father of the local church. However, will he be able to save Lisa?