Kattis Gang revolves around the story of a young man, an avid film buff from a small town in Anaikatti who aspires to become a director, but his life changes drastically when he is dragged into an issue where he has to take a stand.
Five desperate individuals, each burdened by the urgent need for cash, find their paths colliding with a merciless loan shark. As darkness descends, their lives descend into chaos on a night when karma catches up with them, showing the real impact of their actions.
Easwaran, a young government employee gets the shock of his life when his niece Sundari goes missing. When Easwaran gets to know that a child abuser has kidnapped her, after coming to terms with the ghastly reality of being him being wrongly accused in such a child abuse case, he makes it his mission is to rescue Sundari.
Two half-brothers decide to build a house in which they can live together with their respective brothers and families, but an evil man plots to create a rift between the families.
When Sarpatta Parambarai is challenged to a do-or-die match, Kabilan, a young labourer, must choose whether to put on the gloves himself and lead his clan to victory, or be dissuaded by his disapproving mother and dangerous politics.