Aaru is not a perfect film. It is loud, predictable, and violent. But it is a crucial snapshot of Suriya’s versatility. It proves he can carry a raw, mass-market action film without glamour or romance. The film’s climax, where Aaru uses a welding gun as a weapon, is a piece of over-the-top Tamil cinema history.

Aaru discovers that his "mentor" deliberately sacrificed his friends for personal profit.

Aaru is an orphan who grows up in the slums of Chennai and becomes a ruthless henchman for Vishwanathan Ashish Vidyarthi