[3][4][5] The screenplay, written by Rafi, is based on a true story of robbery, gang rape, and murder that occurred in Gazipur on 23 April 2020.

Taskeen Rahman, Rashed Mamun Apu, Elina Shammi, Jamshed Shamim, Farhad Limon, and Munmun Ahmed star in the film.

On 23 April 2020, a police officer arrives at a two-storied residential pink coloured building in a suburb which is the scene of a crime.

When the robbers discovered this, they tortured, raped, and killed the family to keep their identities a secret, slashing the son's throat on their way out of the property.

[5] The screenplay is based on a case of murder and gang rape of four members of a family in Sreepur, Gazipur, which occurred during the COVID-19 pandemic lockdown.

[2][4] Rafi wrote the screenplay based on his visit to the original crime scene at Gazipur, interviewing the eyewitnesses, and meeting and talking to the alleged perpetrators detained in Kashimpur central jail.

[12] In Bangla Movie Database, critic Rahman Moti wrote about Janowar, "(The director) is shown a certain class of people as beasts.

[13] Sarika Sabha from the Dhaka Apologue praised Rashed Mamun Apu's acting, sound effects and make-up in the film.

[6] Kawsar Md Sayem of United News of Bangladesh praised Ariya Arittra's performance.

[2] Sifat Bin Ayub of The Business Standard wrote, "Janowar is not just a film that we can just watch and forget.