Prom Night III: The Last Kiss

In a shocking twist, Mary Lou Maloney, a former prom queen who died in a fiery explosion in 1957, cleverly escapes from the depths of hell. Utilizing her cunning and a nail file, she emerges with a dark purpose: to enact revenge on those she believes have wronged her.

Mary Lou makes her sinister return to Hamilton High School, where she once ruled the social landscape. Her presence immediately stirs unease among the students and staff, indicating that her thirst for revenge is just beginning.

The day after her return, Principal Weatherall begins the grand opening of the newly renovated gymnasium with a ceremonial ribbon-cutting. However, the event quickly spirals into chaos as a mysterious force unleashes powerful winds, unsettling the gathered crowd.

Alexander Grey, an average student with aspirations of attending medical school, faces academic difficulties that concern his guidance counselor, Ms. Richards. She warns him about the consequences of his lack of motivation, stressing the importance of improving his performance.

Mary Lou begins to exert her influence over Alexander, starting with a provocative seduction that happens on the American flag. This act symbolizes her control over the living, marking the beginning of Alexander's transformation under her dark spell.

With Mary Lou’s support, Alexander experiences a dramatic improvement in his grades, propelling him to academic honor and football stardom. However, this newfound success comes at a cost, as it creates tensions between him and his rival, Andrew Douglas.

Alexander's secret relationship with Mary Lou strains his bond with his girlfriend, Sarah Monroe. Tragedy strikes when Ms. Richards is horrifically killed, leading to growing awareness of the dark consequences tied to Mary Lou’s influence over Alexander.

The tensions reach a boiling point when Andrew Douglas confronts Alexander, leading to a heated altercation. In a shocking turn of events, Mary Lou intervenes, impaling Andrew with a spinning drill disguised as a football, marking a pivotal moment in the escalating body count.

In an attempt to mend his relationship with Sarah, Alexander invites her to the prom. Heartbreak ensues when he learns she is going with Leonard Welsh, igniting Mary Lou's jealousy and leading to the tragic death of Alexander's best friend, Shane Taylor.

After Shane's death, authorities wrongly accuse Alexander, leading to his imprisonment. Desperate to prove his innocence, he grapples with the emotional turmoil caused by Mary Lou's malevolent influence.

In a haunting encounter within his cell, Mary Lou offers Alexander a chilling ultimatum: he can join her in Hell to spare his loved ones. Faced with this heart-wrenching choice, he reluctantly agrees, thinking of his family's safety.

As the prom festivities take place, Mary Lou targets Sarah, having already dispatched Leonard. In a frantic race against time, Alexander attempts to save Sarah and confronts Mary Lou in a climactic struggle that leads to a plunge into the depths of Hell.

In Hell, Sarah bravely battles zombified versions of Shane and Leonard while searching for Alexander. With a makeshift flamethrower, she fights against Mary Lou’s plans to make Alexander her eternal prom king, aiming to free him from her grasp.

In a high-stakes showdown, Sarah interrupts Mary Lou’s dark coronation ceremony for Alexander, resulting in an explosive confrontation. In a decisive moment, Sarah manages to destroy Mary Lou, ending her reign of terror.

Even after escaping, Alexander and Sarah face a new horror when Mary Lou reappears, fatally wounding Sarah. Alexander realizes that he is trapped in a temporal loop, reliving events from the past and unable to break free from Mary Lou's haunting presence.