Hungry to finish his detective life and haunted by dark, fragmented memories of his past, Dude uses his sleuthing skills to outsmart the suspects. All set to investigate the last case of his detective life, he somehow ends up battling between his personal and professional life.

As the investigation intensifies, Dude unearths the dark secrets about the suspects. He teams up to discover the hidden truths surrounding the case. The tension mounts as he gets closer to solving the mystery followed by an odd chain of events that unfolds his past escapades.

As Dude’s suspicion on Mrs. Pal intensifies & Mr. Pal withdraws his case from investigation, Dude is further intrigued to prove the false case & plans to help Mr. Kumar against Pawa ji’s will. As Dude’s farewell comes closer, its nail biting to find out if he unravels the mystery in time.

As Dude undertakes his investigation further, he discovers that there is more to the case than meets the eye. He gets entangled in a number of problems as he witnesses that the mystery surrounding him has escalated quite swiftly. However, this case gets more complicated as he unravels the truth. The only survival option he has is to balance his personal and professional life.

After knowing about his mother’s past & Vishal Kaul’s suicide, Dude is driven to experience her mother’s emotional guilt to step into her mind. As the series comes to its season finale, Dude finds out Batra’s connection to the deal & comes up with a plan to unfold the truth.

As Dude and Bhatia are put on a new case, it looks like Dude has given up on the idea of following in his mother's footsteps. However, Inspector Kumar informs Dude that a body has been found that might be his mother. Dude sees the evidence and dismisses the notion that the body is hers. Back home, Dude's dad asks him about the body, but Dude dismisses him too, slowly slipping into denial.

Dude and Bhatia manage to track down Tinku and his gang to a mobile shop owner (Chetan) and later follow the gang to a bar. They're about to catch Tinku when he's rescued by a helmeted biker. With Mahesh's help, they find Chetan's address and break in to find the pen drive but get caught by the police. Kumar gets them out, and later they approach Gautam with all the details.

Dude and Bhatia get pissed that some details weren't shared with them. Pahwaji gets into an accident, but Dude and Ritu deduce that the accident was deliberate. Pissed off, they get the entire gang caught by the police. Dude gets a threatening call from the leader (the biker) but he refuses to back off the case.

Dude submits his DNA sample but believes that his mom is alive, and the earring found is just a clue. Bhatia distracts Dude by discussing the case. Dude reveals that Gautam and Amit were embezzling company money into the crypto wallet, and someone from the office stole that money. That someone turns out to be Vishal, the company's accountant.

Dude is in a hospital being chastised by his close ones for reckless behavior. Later, Dude convinces Bhatia that they need to find Chetan. They reach Chetan's friend's house to find Parveen and Chetan there. Parveen escapes but Dude manages to figure out the second half of the password. Dude gets a call and fears the worst, but comes to know that his DNA matched with the earring, not the body.