It features Karthi in dual roles for the second time after Siruthai as the protagonist and antagonist respectively alongside Nayanthara, and Sri Divya.

The film features soundtrack composed by Santhosh Narayanan, cinematography handled by Om Prakash and edited by V. J. Sabu Joseph.

Kaashmora and his family are con artists who cheat people in the name of black magic and dark spirits.

One day, Yamini, a PhD research student, joins Kaashmora to gather evidence and expose him to the public.

Meanwhile, Jalapathy Rao seeks Kaashmora's help and brings him to a haunted bungalow on the outskirts of Tamil Nadu and Andhra Pradesh.

Kaashmora searches the castle and gets hold of an old book dating back 700 years, narrating about Raj Nayak.

The king remained silent and did not interfere with Raj Nayak's growing atrocities because of his military prowess.

According to an exorcist, Raj Nayak would become immortal if he sacrificed five people in a family born with the same birth star (Rohini).

That night, Navakaali Pournami occurs, and Raj Nayak forces Kaashmora and his family to the guillotine.

While Rathna and Raj Nayak fight each other, Kaashmora fends off the subordinate ghosts with the help of a magical sword.

[8] The technical crew includes the art director Rajeevan, editor V. J. Sabu Joseph, and cinematographer Om Prakash.

[15] Director Gokul says that, 360-degree omnidirectional camera rig is used for shooting a particular sequence and this is the first Indian film to use this technology.

[21] The Times of India rated the album 3 out of 5, and stated that "This one's not a usual Santhosh fest, but works in some parts!

"[22] Kaashmora was released worldwide on 28 October 2016 with Sri Thenandal Films buying the distribution rights.

[25] M. Suganth of The Times of India wrote, "The film contains the usual horror comedy tropes, but presents them all in a slightly different way, and at a grander scale, which makes it feel different, even though it is essentially an old wine in a new, big-budget bottle".