Udhayam NH4 is a 2013 Indian Tamil romantic thriller directed by debutant Manimaran, a former associate of Vetrimaaran. The film features Siddharth and newcomer Ashrita Shetty in the lead roles. Vetrimaaran wrote the script, did the screenplay, and penned the dialogues for this film. The story takes place in Bangalore, Karnataka. The film's soundtrack and background score were composed by G. V. Prakash Kumar. The film released along with a dubbed Telugu version titled NH4 on 19 April 2013.Prabhu (Siddharth) and his friends discuss the route from Bangalore to Chennai and plan to kidnap Rithika (Ashrita Shetty). Meanwhile, her dad appoints encounter specialist Manoj Menon (Kay Kay Menon) who questions Rithika's male friend Deepak (Deepak) about Prabhu. The guy claims that Prabhu is a drug addict and was always trying to woo Rithika, who started to avoid him because of Prabhu. After that the plot continues when Manoj tries to track Prabhu and his friends. In the attempt, they track down a message from another friend Umesh asking Prabhu and friends to come to Bangarpet bus stand only to find Manoj and his team arresting the guy for more information. Manoj goes to a railway station where the train in which Prabhu and Rithika are travelling to Chennai. He finds Rithika and forcefully drags her into his jeep. As the flashback winds again (this time by Rithika), she fell for Prabhu after seeing him on many instances showing his presence of mind. As the flashback ends, Manoj finds Prabhu on the highway where he doesn't stop until he runs over pieces of glass put down by Prabhu. They get into a brawl where Prabhu loses and Manoj continues in the highway but has to stop in a railway signal at the Andhra Pradesh- Karnataka border. Prabhu takes his chance and threatens Manoj keeping his throat under a blade and taking Rithika with him. After a cat and mouse chase, Manoj calls Prabhu saying that his friend needs immediate treatment after an accident. He goes in search of Manoj and involves in a fight with him again. Now, after the stroke of midnight Rithika turns 18 giving her the right for choosing her partner. After that Manoj leaves the Highway as he couldn't do anymore according to law.