The movie has brought together Vishal and his 'Theeradha Vilayattu Pillai' director Thiru for the second time.
Trisha Krishnan has denied many offers to work with Vishal in the past.
Most of the shooting took place in Ooty.
The story revolves around Sakthi who goes to Bangkok on a personal trip before realising that someone is following him.
The movie is being produced by Balaji Real Media, which produced 'Osthe' before.
Vishal will be seen in a whole new avatar of a forest trekking guide in the film.
The film is expected to be released on August 15.
A major part of the film has been shot in Thailand.
Ace writer S Ramakrishnan has written the dialogues of the film.
Vishal started his career with an un-credited role in 'Jadikkaetha Moodi'.
The National Award winning actor, Manoj Bajpayee, is playing a crucial role in 'Samar'.
With Trisha and Sunaina playing the heroines opposite Vishal, 'Samar' is an upcoming action movie.
The cast of the movie includes Vishal, Trisha Krishnan, Sunaina, Manoj Bajpayee and JD Chakravarthy.
The music of 'Samar' is composed by Yuvan Shankar Raja.
Vishal is playing Sakthi, a trekking guide in 'Samar'.
Trisha and Sunaina are playing the leading ladies of 'Samar'.
Earlier it was rumoured that Arvind Swamy is going to play the villain in the film.
The name of Trisha's character is Maya. She plays a Tamil girl who lives abroad. Sunaina plays Roopa, a resident of Ooty.