A young man gets sucked into an adventure as he searches for his lookalike.

Three roommates get into trouble over a missing bike and a stolen bike, which, intriguingly, could be the answer to their problems.

Dakshna Murthy is a young man who keeps losing his jobs frequently because of his moral ethics. Malar, his sister-in-law is a confident, young, beautiful woman who works in a jewelry shop. Malar lost her husband (Dakshna’s brother) within a month of their marriage. For reasons unknown, her husband is found dead on the railway tracks nearby their hamlet. Despite being a young widow, both Malar and Dakshna live under the same roof because Malar has married his brother opposing her family. Dakshna tries to convince his sister-in-law to remarry, but she keeps refusing.

Raja is a Police Constable. He falls in love with an aspiring writer Ranguski. Raja often visits Maria, a Senior citizen who has demanded Police protection as she is an antique collector and possesses many valuable things. Maria and Ranguski live in the same Housing Complex. Raja tries to woo Ranguski by making her prank calls in the name of a stranger and forcing her to love him instead. As Ranguski is frustrated by this, she falls in love with Raja. But to Raja’s surprise, he finds that Ranguski still gets such calls from a stranger. Soon, he too gets such calls and the caller threatens to Kill ranguski. Raja rushes to Ranguski’s home to save her and eventually does., but finds out that the Killer has killed Maria.Circumstances prove that Raja is the Killer and the Police arrest him. Was Raja able to escape and find out who is the real killer forms the crux of the movie., which ends with an unexpected twist.

Raja (Nakul) is a kick boxer, a happy-go-lucky guy who falls madly in love with Valli (Chandni) who is a law student. She is into a lot of social causes and assists Kamaraj (Manivannan) who is fighting a losing battle against a thug Isaikimuthu. Valli along with her senior (Kasturi) tries to re-open Kamaraj’s suicide case and has evidence to prove that it was a murder, she is on the run. No, our macho hero turns her savior and tried hard to protect her. There is Reema (Avani Modi) and Wahab, friends of Raja who helps him. How Raja fights all the goons single-handedly and triumphs forms the story.

Vil Ambu is a journey of two characters and talks about how humans are responsible for each other’s loss or gain. The story is about how the loss of one person becomes the gain of the other.