Episode 4 of "Lukkhe" commences with a vivid flashback to Gurbani's house, where her sister, Ashnoor, is consumed by drugs. Ashnoor, blaming her family for her sexual assault, attempts to take her own life. Gurbani and Ashnoor's father return home, attempting to intervene but ultimately ending in a tragic scuffle where Ashnoor fatally wounds her father before ending her own life.
In the present, Gurbani shares with Lucky the devastating impact of Ashnoor's death on her family. She laments how Ashnoor's addiction ravaged their lives and pleads with Lucky to persuade Sanober to file an assault case against OG.
Simultaneously, Badnaam enlists Jazz to repair their damaged car before Paddy learns about the recent attack on them. Later, Badnaam takes Paddy to the studio and records a new rap song, still fueled by the drugs he consumed the previous night.
Elsewhere, Inspector Hardik and the police investigate the chaotic parking lot shootout. Gurbani informs Hardik that Badnaam and OG are connected to the incident, but he dismisses her claims. Instead, he urges Gurbani to convince her informant to become a public witness in the case.
Hardik secretly shadows Gurbani as she meets with Lucky and requests him to gather evidence against Badnaam. Meanwhile, Sutti arrives at the Walia house, carrying his brother's lifeless body and blaming OG for his demise. He reveals that OG underestimated Badnaam's influence and exposes Badnaam's involvement in the drug trade.
Mr. Walia urges Sutti to avenge his brother's death by killing Badnaam. He then advises OG to remain hidden until Sutti completes the task. Concurrently, OG grows increasingly concerned about Badnaam's escalating influence in Punjab.
Later that day, Lucky requests Sanober to file an FIR against OG. Sanober reflects on their past, recalling how, after their mother's death, the police separated her from Badnaam as children. She recalls how Badnaam fought the officers to protect her and insists that she cannot betray him now.
Lucky endeavors to persuade Sanober to trust in the judiciary, yet she counters that OG's immense wealth and power are ample to manipulate the system. Subsequently, Lucky escorts Sanober home and introduces her to his mother as his girlfriend. His mother warmly embraces Sanober, making her feel accepted as a part of their family.
Parallel to this, Gurbani meets Altaf, an informant of her father's, and requests him to identify the individuals involved in the parking lot shootout. Later that night, Gurbani returns home and feeds soup to her bedridden father. He urges Gurbani to cease blaming herself for Ashnoor's death and encourages her to move forward with her life.
In another part of town, Badnaam, Paddy, and Jazz rent out a gaming parlor for their music video shoot. Meanwhile, Lucky grapples with guilt for betraying Sanober while still assisting Gurbani. He visits Sanober's house while Badnaam and the others are absent at the parlor.
While Sanober is in the shower, Lucky surreptitiously searches the house for evidence against Badnaam. He is about to uncover the hidden Mitta vials in the backyard when Badnaam, Jazz, and Paddy unexpectedly return home. Lucky swiftly lies about searching for flowers for Sanober, although Badnaam remains suspicious of him.
That night, Altaf successfully arranges a meeting between Gurbani and Sutti at a butcher's shop. The confrontation swiftly escalates into another shootout, resulting in Altaf's death, while Sutti escapes after attacking Gurbani.
The following day, Lucky informs Gurbani about the music video shoot at the gaming parlor. Sanober observes the growing tension between Lucky and Badnaam and becomes concerned about their relationship. Suddenly, Sutti arrives at the parlor with several armed men and attacks the group.
During the shootout, Sutti attempts to shoot Sanober, but Badnaam takes the bullet instead. Just as Sutti is about to kill Sanober, Gurbani arrives and fatally shoots him, bringing the episode to a close.
