Rahul, who is asked to immerse his late grandfather's ashes in Rameshwaram, unwillingly boards the Chennai Express and finds himself entangled with Meena, the daughter of a don.
Naina, an introverted, perpetually depressed girl's life changes when she meets Aman. But Aman has a secret of his own which changes their lives forever. Embroiled in all this is Rohit, Naina's best friend who conceals his love for her.
In the 1970s, Om, an aspiring actor, is murdered, but is immediately reincarnated into the present day. He attempts to discover the mystery of his demise and find Shanti, the love of his previous life.
Kaira is a budding cinematographer in search of a perfect life. Her encounter with Jug, an unconventional thinker, helps her gain a new perspective on life. She discovers that happiness is all about finding comfort in life's imperfections.
Dev, a famous footballer, becomes injured and gets dependent on Riya. Brooding on his ill-fate, he gets suspicous of an affair going on between Riya and another man. Is the affair a reality, and if it is, will Dev openly accuse Riya?
During their college years, Anjali was in love with her best-friend Rahul, but he had eyes only for Tina. Years later, Rahul and the now-deceased Tina's eight-year-old daughter attempts to reunite her father and Anjali.
An army major goes undercover as a college student. His mission is both professional and personal: to protect his general's daughter from a radical militant, and to find his estranged half-brother.