Plot
Tucker Williams, dressed in shiny, chest-exposing clothing, spins platters as the "Disco Godfather" at his "Blueberry Hill" discotheque during the late-1970's height of the disco era. In the audience is his nephew Bucky, a basketball star, who ignores the entreaties of his girlfriend and goes outside to score some angel dust. Bucky's girlfriend comes screaming back inside, telling Tucker that Bucky has taken drugs.
Bucky wanders back in, hallucinating, thinking people, or demons, are attacking, and he is taken to the hospital under the care of Dr. Mathis. Tucker visits him, but is told Bucky, who hallucinates losing an arm, will take a while to recover. Tucker also sees the crowded PCP-victim ward room.
One such victim is a young woman cradling a doll. Mathis relates that she says she served her own baby as holiday dinner, mistaking it for a ham. Tucker determines to wipe out the PCP menace. He visits the precinct where he used to be a policeman; he is welcomed by cop Kilroy and Lieutenant Hayes, who expresses support for the anti-drug crusade.
The mastermind behind the epidemic is revealed as Stinger Ray, a businessman who wants to run a basketball team but is also selling PCP, including "sherms" (marijuana joints dipped in PCP). He puts a hit on Tucker, but then puts a hit on his own hitmen, since he hates Tucker and wants him alive to deal with. After a disco-dancing and -skating show at Blueberry Hill, two hitmen try to shoot Tucker, but Stinger's other two hitmen, dressed as cops, come in, shoot them, and leave.
Community activists enlist Tucker's help, and a large "Attack the Wack" rally against PCP occurs. Tucker and companions start an intimidation campaign against dealers, beating them up.
He and a friend break into a party held by pimps and whores, and Tucker forces the pimps to say they'll alert him to any PCP activity. Tucker's friend finds a Saturday Night Fever album cover with cocaine on top. Tucker blows the powder all over before leaving; the partyers get down on the ground to snort it up.
A raid on a PCP den reveals no drugs; Tucker figures there is a mole in the police squad. A ruse by Tucker and Hayes reveals that Kilroy is the mole; Hayes asks him for his gun and badge. Later, Kilroy's horrified wife discovers his dead, wrist-slitted body in the bathtub.
Meanwhile, casualties mount: PCP thugs murder Tucker's elderly friend Bob, an expert on Black history. Tucker's interrogation of one of them, the young man who sold Bucky PCP at the disco, reveals that Stinger is the mastermind. Following this, Tucker is briefly kidnapped by a cowboy hippie thug with a gun, who stops to whip him, but Tucker pulls back on the whip and catapults the thug into a wall.
Assaulting Stinger's building, Tucker and a friend pulverize numerous henchmen in a kung-fu fight, including an immense bald bruiser who once installed a tap on Tucker's phone before beating him up and fleeing. Tucker presses his thumbs in the bruiser's eyes, and withdraws with blood on his thumbs as the bruiser collapses.
Then Tucker confronts an even tougher, maniacally-snarling fighter, who bests him and puts him in a gas mask to force him to inhale PCP. Tucker gets the thug's neck in a leg-hold and forces him to take off the mask, but the PCP is already taking effect, and Tucker screams, waves his arms, and freaks out, envisioning himself in a coffin.
Intercutting with scenes of a group of church members praying at Mathis' clinic for a young girl incapacitated by PCP (who eventually recovers): the recovered Bucky and the police come to help Tucker. While Tucker hallucinates badly (seeing his mother, various demonic figures and/or "Angel of Death", etc.), the fleeing Stinger bumps into him; he strangles Stinger, seeing him as a red-flashing demonic figure, including animated effects. Tucker screams "You're not my mama! You're evil!"
Bucky and Hayes arrive; Bucky apologizes to Tucker for causing trouble in the first place, and Hayes says they'll take Tucker to the hospital, but the film ends with the still-disturbed Tucker loudly screaming, "Take your hands off of me! AAAAAAAAHHHHHHHH!"
