Pulanaivu is a Tamil-language crime thriller film. In the film, a couple is entangled in a sudden murder happening at their college, causing danger to everyone. Meanwhile, a female cop have to trace the few suspects and find the murderer. Plot: Aishwarya is a woman who is just starting college, she is trying to move on from her previous relationship. So she is not interested when her new friend falls for her and tries hard to earn her love and attention. As their love story develops, a murder suddenly occurs in their college, putting their lives and loved ones in danger. Meanwhile, Bhairavi, a female cop is investigating the case. There are few suspects, will they find the right murderer?