As the police are running their investigation in trying to nab the killer, Meenu Karthiga's spirit enters another young girl's body and attempts to kill the people who had killed her. As a result, numerous problems crop up for all those associated with the issue. The rest of the plot revolves around whether the falsely-accused individual is let-off and if Meenu Karthiga finally gets her revenge against her killers.
Meenu Karthiga, Shankar, Vishnu Hasan, Preethi, Angana Roy along with Kamna Singh have all played their parts in a decent manner without going overboard at any instances. Karate Siva Vaanchi, Niyamath Khan, producer K. Shanmugam, Ashwin Kumar, Ganja Karuppu, Madhan Bob, Meera Krishnan, Chitra Lakshmanan, Paravai Muniyamma, Nandhakumar among others have played their supporting roles in a commendable manner.
Director Vishnu Hasan has attempted to tell a story that focuses on how a murdered woman's spirit seeks revenge against her killers, but has failed to craft an engaging screenplay. The portions where the ghost appears do not scare us, but rather leave us in splits. Sathish Chakravarthy's background score barely adds to the ambience of the film while PKS Daas's cinematography skills come to the fore and he has shot the film well.
In short, Ullam Ullavarai is not frightening.