Crime thrillers in Malayalam storytelling have often leaned on atmosphere-cities and towns doubling as conspirators, landscapes holding secrets, and silence carrying as much weight as words. Kammattam, a six-episode series streaming on ZEE5, enters that tradition with a story inspired by the shadows of a cooperative bank scam in Thrissur. In its lean runtime, it delivers a tightly wound procedural that flirts with greatness but stops short of unearthing the deeper truths buried beneath its premise.