DCP Indrajit is assigned to investigate four consecutive murders in the city. While juggling responsibilities at home and work, he suspects the cases are linked to human organ trafficking.
Unable to find Bishwojit, his mother turns to the cops and informs them that Bhakai hospitalised him. Later, she learns of Bishwojit’s death. Indrajit fails to arrest Bhakai, who subsequently is shot.
Bishwojit’s mother sits on a hunger strike outside the hospital. Meanwhile, Indrajit nabs a suspect, but Bijay’s men kill him. Later, Bijay dares Indrajit to solve the case in 24 hours.
To win the challenge, Bijay asks Dr. Shalini to perform one last surgery. Acting on a tip, Indrajit and his team surround the hospital and ask her to surrender. Panicked, Shalini turns to Bijay.
Bijay kidnaps Indrajit's son, Papai from his school to avenge Shalini's death, causing Madhumita to break down. Bijay calls Indrajit and threatens to kill Papai.
As crime in Bengal becomes increasingly complex, DCP Indrajit Basak leads the Special Investigative Team (S.I.T) to solve challenging cases while balancing his demanding family life.
Unable to bear the neighbours' taunts, aunt Toton's daughter, Mitin, attempts suicide by poison. Madhumita, rushes there upon hearing the news. A female inspector arrives to speak with Mitin.
Inspector Romi arrests Basudeb to get justice for Mitin. Indrajit discusses Nandini's 15 emails about a scammer. Meanwhile, Basudeb traps yet another girl, Mallika, in a romantic scam.
A disguised Romi follows Indrajit to the temple. Realising she is Nandini, he asks her to join his team. Basudeb marries Mollika and sends their intimate photos to her father, demanding money.
Mollika is shocked to see Basudeb’s true face. He extorts money from her father. Later, Indrajit begins searching for Mollika on her father’s request. Meanwhile, Papai recognises Basudeb from a photo.
Indrajit installs a GPS tracker on Mollika’s father’s watch, and his team tracks it to catch Basudeb. Although Basudeb is caught, he escapes before being arrested, while Romi rescues Mollika.
Indrajit seeks Rohit’s friend Rai's help to catch Basudeb and nabs him eventually. Meanwhile, an elderly couple loses all their savings and is left helpless.
Binay, aka Borda, runs a fraudulent business in Shimulpalash village. After a tip-off, Anwesha seeks to interview him, while Indrajit focuses on catching cybercriminals.
Retired Sub-Inspector Arun, a cybercrime victim, seeks police help. Meanwhile, Borda’s business thrives. Indrajit takes help from Sub-Inspector Neelima to catch Borda.
Sub-Inspector Neelima aka vlogger Anwesha visits Borda's home for an interview. Rohit photographs the family while Indrajit monitors the camera. Suddenly, someone calls Borda 'devil' and curses him.
On returning from Shimulpalash, Neelima and Rohit confirm Indrajit’s suspicions about Borda. Neelima reveals she has all the reports exposing his fraud. Meanwhile, Nilu and Shyamoli quit their jobs.
The video exposing Borda’s misdeeds goes viral. Indrajit calls to threaten him. Meanwhile, Nilu secretly weds Shyamoli. The next day, Indrajit arrives with his team to raid Borda’s house.
When the raid finds nothing illegal, Borda orders Indrajit to apologise. However, his nephew later exposes Borda's hidden stash, leading to the recovery of illegal items and Borda’s arrest.
A series of child disappearances worries Indrajit, who discusses the matter with his team. Meanwhile, at the orphanage, teacher Amina tells Yusuf that the children seem deeply traumatised.
Along with flower seller Rubina, Tinni and Mini from Deepshikha orphanage disappear. Acting on Yusuf's tips, Indrajit sends Romi and Debu to investigate. Elsewhere, trafficker Pradipto plots secretly.
Pradipto’s men kidnap a school child and take him to the orphanage. However, Sanatan identifies the kidnapper as Raju. Meanwhile, Pradipto finds out that Amina knew Yusuf earlier.
Indrajit reaches the orphanage with Debu and instructs Rohit and Neelima to find Neela’s address. Later, the SIT pursues kidnapper Raju, while Prodipto targets a teacher next.
Rohit successfully hacks the orphanage system. A disguised Romi saves him from getting caught by Prodipto. Later, Prodipto is shocked when Indrajit mentions Bablu’s name.
A girl from the orphanage calls Indrajit. Suspecting trouble at the orphanage, he rushes there with his team and corners Prodipto. Meanwhile, Papai’s birthday celebration begins at Indrajit’s home.
After Indrajit and his team nab Prodipto red-handed, he attends Papai’s birthday party. Later, he learns about rising drug abuse in the city and vows to uncover the root of the racket.