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Malayalam cinema has a rich history of courtroom dramas, but Mr. Marumakan sits perfectly in the sub-genre of "courtroom comedy" alongside classics like Nadodikkattu (the "Kerala Cafe" scene) and Mazhavillu . Fans love watching legal absurdities played for laughs.

The central conflict begins when Ashok Raj’s sister is mistreated by her husband’s family, who happen to be legal stalwarts. To save his sister’s marriage and dignity, Ashok Raj is forced to step into a world he knows nothing about: the courtroom. With the help of a disillusioned former judge (played by Mammukoya), he poses as a brilliant, high-profile lawyer.