Like it's protagonist & his team (aka family), even Thunivu's screenplay follows the KISS policy - Keep it simple, silly. The bank heist plan to steal 500cr goes haywire when another team led by the Devil himself take over the heist with eyes on far bigger amount and deeper motive. Who is this Devil and why is he involved in the heist forms rest of the story. With AK leading from the front, Thunivu has a solid first half getting everything right from his intro to using his swag to kickstart the story. There is a barely a dull moment here.
It is the second half which is over simplified with two back to back flashbacks where H. Vinoth let go of his inner Atlee. It brings a major tonal change and the attempt to bring in a strong yet emotional justification to the hero's actions turns out to be too desperate. It messes up the flow big time. Also the oversimplification of the issue highlighted here, makes the action that follow look silly. If only things could be resolved in such a simple manner.
The supporting cast gets badly sidelined in the second half and the prolonged action sequence in the climax doesn't help the proceedings. One cannot help wishing for a better second half as the current one simply doesn't do justice to the entertaining first half.