Kalavani is a film about the torrid, rural romance that unfolds amidst the bitter rivalry between villages. Arikki (Vimal) is a wastrel, who has led a vain and aimless life. He meets Maheshwari (Oviya), who then becomes the reason for his existence. After several comic escapades, the two elope but are chased by Maheshwari’s terrifying brother, who has sworn to avenge his humiliation by spilling Arikki's blood.