Baby John follows the life of Inspector Satya Verma, who goes by the alias Baby John and lives a seemingly peaceful life in Kerala with his daughter Khushi and his old friend, Ram Sevak. To the outside world, Baby John is a man of peace, but his true past as a fierce inspector is revealed when Khushi’s teacher uncovers his secret. The narrative delves into a flashback six years prior, where Baby John was married and involved in a high-stakes battle against Babar Sher, a powerful figure exploiting young women. The film explores Baby John’s journey to avenge his wife Meera’s fate and his fight against the exploitation of women.