The story is set in 1988. Haider who worked for Mumbai underworld develops a plan to steal diamonds from a racket based in Kohinoor textile store in Cherupuzha run by Mamman and Xavier. He hires Nicholas and Freddy from Kochi for the theft. They in turn make sub-contract to a small-time thief Aandikunju, who gets his friend Louis involved for steal from group. Louis as a 1980s characterized youth has admiration for the underworld dons and is highly fascinated by Mammootty's character Tharadas from the popular film Athirathram and Mohanlal's character Sagar Alias Jacky from the popular film Irupatham Noottandu, and wants to be a successful smuggler like them. The team runs into many obstacles during the thievery. In the end both Haider's team and Louis team takes a share of the diamonds, with risking life and show of confidence.
Malayala Manorama rated 2.75 out of 5 stars and concluded "Kohinoor is a fun-filled thriller and has all the elements of an entertainer, with a pinch of romance, friendship and wicked twists" and gave special mention to cinematography and lead performances especially for Indrajith's screen presence and dialogue delivery. Filmibeat.com rated 2.5 out of 5 stars and described as "A well-packed entertainer with the right elements of humour, thrill and nostalgia", giving special mention to Indrajith's performance, also cinematography, editing, art and costumes which helps to create the ambience of the 80s. Indiaglitz rated 3 out of 5 stars and wrote "It has a liner narration and what would stead the movie in good stead is the comic touch throughout. 'Kohinoor' has been able to make it till the far end and not flatter halfway". The Hindu stated "The proceedings before interval, which focusses on the planning of the heist, are marked by aimlessness. Things pick up post-interval especially in the long sequence set inside the textile shop. The quick twists and turns come together in the end to make an average heist movie in the end".
Music
All songs are composed, arranged and produced by Rahul Raj. The lyrics were written by B. K. Harinarayanan. Muzik 247 was the music label. The audio launch event was held in Kochi on 8 September. Apart from the cast and crew, film personalities such as Mammootty, Sibi Malayil, Kunchacko Boban etc. were also present. Mammooty and Sibi Malayil together launched the audio by unveiling the CD. The songs were streamed live on Muzik247's YouTube channel at the event. The official launch of the production house Adams World of Imagination was held coinciding with the audio launch function. It was launched by Mammootty. The melody Hemanthamen which was released on 5 August, received overwhelming response from critics and public alike. It garnered more than 100000 views within three days of release in YouTube and as of December 6, 2016, the song has reached to 3 million views. Actor Dulquer Salmaan officially released and shared the YouTube link of the song "Dum Dum Dum" on Facebook.
