Udhayam NH4 is an Tamil action - thriller movie directed by debutant Manikandan, a former associate of Vetrimaaran. The film features Siddharth and newcomer Ashrita Shetty in the lead roles. Vetrimaaran has written the script, done the screenplay, and also penned the dialogues for this film.The movie story is set against the backdrop of the National Highways leading to Bangalore.