Sam Jones and Athulya Ravi are long time lovers, who suddenly break up due to a few misunderstandings. The protagonist out of frustration and a clash of ego throws a 'break up party' for his fellow friends. The images of which surfaces on social media pages post the celebrations. A heartbroken Athulya comes across this and gets extremely angry and decides to avoid him at any cost. 

A few days later, Sam understands his side of mistakes and reaches out to Athulya, who's phone is constantly busy. After many tries, Sam loses his patience and his rationality, and comes to a conclusion that Athulya has already moved on with another guy, and has been using him all the while. This jealousy and possessiveness pushes him into a depression and a psychotic state, and he convinces himself to kill Athulya.

He pitches this idea to his mentor Samuthirakani and requests him to help him, who flips at him and advices against Sam's ideas, telling him to drop the thought and to let go of Athulya. But, all to no vain, as Sam is hell bent on obsessed with murdering her. Fearing for both Sam and Athulya's safety, Samuthirakani decides to pull Sam out of this mess by agreeing to help him. How Samuthirakani goes about it and whether Sam kills Athulya forms the rest of the story.    

Sam Jones has now successfully made his Kollywood debut through this film, and has delivered a decent performance. He seems to have a lot of potential to become an established actor. A proper director and good script could definitely tone him to a actor as he has all the credentials to be one. 

Comparing to her previous performance as an innocent girl, Athulya has played a bold character in the film. The story revolves around her, and hence her role has a heavy importance. Likewise, she has done a justice to her character. Samuthirakani's role is a really interesting one, and as always the versatile actor has pulled of his character with ease and has delivered a top notch performance. Among others Bala Saravanan, Roshini Prakash and Singampuli have done justice to their roles. 

Debutant VZ Dhorai has attempted to show how a modern heart break works with a twist in it. He has to be appreciated for breaking through the stereotype, and show how both men and women in equal footing. However, he definitely could have paid more attention to the screenplay, as it was all over the place and confusing. Though as an audience we understand his message, it lacks the much needed punch as it wasn't really impactful.

Sam D Raj's music could have been much better, as both the songs and background score are average. Both IJ Prakash and M Rathish Kanna's cinematography skills come to the fore, and their shot's are decent. So is R Sudharsan's cuts.

In short, Yemaali, could have been better.