The movie is about a love story between the main characters, Tamil and Mozhi. This story begins from their first encounter in their high school years till their adulthood. The movie illustrates how their relationships are coping with different challenges over time.

Based on the police drama series Kaaval which aired four seasons on TV2 (2014-2021). Due to the increasing crime rate in the city, ASP Lawrence and his team Inspector Allena, Inspector Thivya and Inspector Agho work together to catch the criminals and gangs involved. After a long investigation, they are able to identify certain gangs and group leaders involved in drug trafficking and human trafficking. Meanwhile Karthik and Kaviya are college students who are very much in love and Karthik seeks help from his brother Thillai to talk to Kaviya's father for the approval of their relationship. Kaviya's father Barathan is a famous scrap metal business owner but few know about his past. Barathan is very unhappy with Karthik. Lucy and Martin have instead asked their gang members to get young girls kidnapped and to be sold in Thailand.

Appalasamy (Gana) and his wife Nalaini (Jaclyn Victor) is blessed with a beautiful girl called Shruthi (Raja Ilya). One fateful day, Nalaini gets into a car accident while on the phone arguing with Appalasamy. He promises to his late wife that he will take good care of their daughter, which leads him to become overprotective of her.