Prom Night III: The Last Kiss 1990

In a macabre twist of fate, Mary Lou Maloney, the former prom queen who met a fiery demise in 1957, manages to escape the shackles of hell by employing her cunning and a nail file. Her malevolent spirit returns to Hamilton High School, where she wreaked havoc during her lifetime, and begins to exact revenge on those she deems worthy of punishment.

The day after Mary Lou’s return, Principal Weatherall inaugurates the newly reconstructed gymnasium with a ceremonial ribbon-cutting ceremony, only to suffer a bizarre mishap that inadvertently unleashes a maelstrom of chaos throughout the facility. As if fate had conspired against him, the principal’s careless move sparks an unseen force to wreak havoc on the gymnasium, sending powerful gusts of wind through its halls.

Meanwhile, Alexander Grey, a moderately talented student with aspirations to attend medical school, is struggling to find his footing in life. His mediocre grades and lackluster performance have earned him a stern warning from guidance counselor Ms. Richards that he will likely be doomed to a life of menial labor unless he can dramatically improve his academic standing.

As Alex navigates the complexities of high school, Mary Lou begins to make her presence known, initially by seducing him in a graphic and compromising position on the American flag, symbolizing her mastery over the living. Throughout the day, Mary Lou continues to manipulate events to favor Alex, influencing his performance on a biology test and even altering the outcome of a football game, much to the chagrin of his rival, Andrew Douglas.

With Mary Lou’s guidance, Alex’s academic prowess begins to soar, earning him a spot on the honor roll and catapulting him to football stardom. However, this newfound success comes at a cost, as his clandestine relationship with Mary Lou strains his bond with Sarah Monroe, his girlfriend.

As the body count rises, including the demise of Ms. Richards, who meets a gruesome end via battery acid, Alex begins to realize that Mary Lou’s influence is not only destructive but also increasingly possessive. Despite her malevolent nature, Alex finds himself torn between his desire to break free from Mary Lou’s grasp and the intoxicating thrill of their twisted romance.

In the midst of this turmoil, Andrew Douglas confronts Alex, leading to a violent altercation that ultimately ends in tragedy when Mary Lou impales Andrew on the football goal post using a football that morphs into a spinning drill, sealing his fate. As tensions between Alex and Mary Lou reach a boiling point, he attempts to extricate himself from her grasp, prompting an enraged Mary Lou to unleash a maelstrom of violence and chaos upon the unsuspecting students of Hamilton High School.

As Alex (still reeling from his tumultuous breakup with Mary Lou) attempts to mend fences with Sarah by asking her to the prom at the newly inaugurated gym, he’s met with a crushing blow: she’s already committed to the awkward yet affable Leonard Welsh. The sting of rejection is further amplified when Alex becomes the unwitting target of Mary Lou’s relentless stalking, which culminates in the tragic demise of his best friend Shane Taylor at her merciless hands. As the authorities blame Alex for Shane’s murder, he finds himself imprisoned and desperate to clear his name.

Meanwhile, Mary Lou’s malevolent presence continues to wreak havoc from behind bars. During a chilling encounter with Alex in his cell, she exacts a twisted promise from him: if he agrees to accompany her to Hell, she’ll spare the lives of everyone else. With the prospect of saving those he loves weighing heavily on his conscience, Alex makes the agonizing decision to join Mary Lou on their descent into the underworld.

As the prom’s festivities unfold at Hamilton High, Sarah finds herself under siege by Mary Lou, who had brutally dispatched Leonard with magnetic tape. With Officer Larry held hostage, Alex commandeers a vehicle and speeds toward the gymnasium, where he hopes to intervene before it’s too late. In a heart-stopping sequence of events, Alex and Mary Lou disappear into the depths of Hell as Sarah gives chase, managing to leap into the portal just as it’s about to close.

Upon arriving in this desolate realm, Sarah embarks on a perilous quest to rescue her beloved Alex from the clutches of his demonic companion. With a makeshift flamethrower fashioned from a mangled torch, she battles zombified versions of Shane and Leonard, ultimately tracking down Alex to Hell’s eerie equivalent of Hamilton High’s gym. There, she interrupts Mary Lou’s macabre plans to crown Alex her eternal prom king, sparking a violent confrontation that culminates in the destruction of Mary Lou at Sarah’s hands.

In the aftermath of this apocalyptic showdown, Alex and Sarah steal away to a garage within the school, where they hotwire a vehicle. As they make their escape, they’re confronted by the charred remains of Mary Lou, which Alex dispatches with a cold calculation. Reappearing on a desolate street, they’ve left the underworld behind, forever changed by their harrowing experiences in Hell.

As the dust settles on the chaotic events, Alex and Sarah (piling into their vehicle) think they’ve finally found a moment’s peace, heading to a cozy diner to reconnect with their loved ones. But their hopes of closure are brutally shattered when Mary Lou rears her head once more, plunging her arm deep into Sarah’s body with devastating force. As the life drains from Sarah’s eyes, Alex becomes acutely aware that he’s trapped in a bizarre temporal loop, reliving the 1950s in stark contrast to his own modern sensibilities. The world around him seems stuck in a bygone era, where people oblivious to his presence ignore his frantic attempts at rescue. Crushed and disoriented, Alex’s grip on reality falters as Mary Lou’s malevolent force closes in, leaving him helpless and hysterical with despair.