Deiva is an illiterate village bumpkin who is naive and is devoted to his family, gives a job to Pachakili who makes fun.

As a result, Lakshmi's mother switched the stillborn baby with an infant Deiva, whom she found abandoned in a train latrine.

Meanwhile, Rasathi's brother arranges her wedding with Deiva's cousin, but she consumes poison and blackmails her family that she will die unless Deva marries her.

Shortly after her funeral, Selva comes back home and heavily criticizes Ramasamy for mistreating Deiva.

"[5] Visual Dasan of Kalki wrote that a fan who ignores Manasthan, where there is no innovation in anything be it cinematography, music or direction, is really a knowledgeable.

[3] Malathi Rangarajan of The Hindu wrote "THOUGH THE story dates back to the films of the 1960s when family drama ruled the roost and though the suspenseful parts are easily predictable, treatment and direction wise Malar Combines' "Maanasthan" passes muster".