Shiva (Prithviraj Sukumaran) is an energetic, enthusiastic college student. Being short-tempered, he gets easily provoked by the rich, proud Vasu (Karthik Kumar) and his sneering attitude. From glares and snarls to punches and fights, Vasu and Shiva do it all, even for unreasonable, petty things. Shakthi (Shakthi Vasudevan) stops their quarrels before they injure each other very badly. As he is friendly, kindhearted and cool-headed, Shakthi tries to bring Shiva and Vasu together on friendly terms, but in vain. Shiva, Shakthi, and their faithful friend Bala (Vishnu Priyan) stay together through thick and thin, and are always ready to voice out their views on behalf of the hostelites in the college. Shakthi’s father (Bhagyaraj) often visits his son in the hostel and is like a father to all of Shakthi’s friends. Meera (Priyamani), the daughter of an MLA, nurtures a soft corner for Shiva. She is brave enough to stand up to him and check him when he throws unnecessary tantrums. Shalini (Anuja Iyer), Meera’s friend, is a shy, reserved Muslim girl from a very strict family background. She is often preoccupied with her own thoughts. Karthik (Lollu Sabha Jeeva) is a total showoff who tries to humiliate Shiva and Shakthi, but ends up making a fool of himself.

Vasu, a common man from Tamil Nadu, joins the BSF with the hope of living a better life. He one day falls in love with Khanoum, whom he names Kajal, without actually knowing she’s from Pakistan. Meanwhile, riots break out in Kashmir, forcing all Pakistanis including Kajal to go back to Pakistan. But: hurdles break in. Vasu, despite of knowing he can be in danger, risks his life to bring Kajal back to her home and unfortunately gets caught in an illegal camp run by Pakistani soldiers. Vasu, now realizing that his duty is not only to protect Kajal but his fellow soldiers, starts to understand his true love: for Kajal and for his nation. He decides to return and protect his love. Will he be successful? To find out, watch WAGAH.