Killer Workout

A young model named Valerie is burned in a tanning salon accident, an event that forever alters her life. The trauma hints at a hidden transformation that will surface years later. Five years pass before the story continues.

Five years after the accident, Valerie's twin sister Rhonda Johnson operates a fitness club in Los Angeles. She asserts control over staff and routines as she builds the business. The setup foreshadows the later reveal of their true relationship.

Rhonda confronts her employee Jaimy for failing to lead an aerobics class as scheduled. The confrontation establishes Rhonda's domineering influence at the club. Tensions begin to rise beneath the surface.

A killer brandishing a large safety pin enters the women's locker room and slashes Rachael to death. The brutal murder shatters the club's sense of safety and signals a serial threat. The attack sets the central mystery in motion.

Closing the club for the night, Jaimy discovers Rachael's corpse stuffed in a locker and a blood-soaked knitting needle in Diane Matthews' locker. The grim discoveries deepen the mystery and point to a wider pattern of killings. The scene escalates the tension surrounding the club.

Detective Morgan is assigned to the murder case and starts questioning Rhonda and Jaimy. His involvement shifts the narrative from a local tragedy to a formal police investigation. The questions raise doubts and probe hidden relationships.

The next day, Chuck is unexpectedly hired by Rhonda's senior managing partner at the club. His arrival alters dynamics within the staff and hints at future power struggles. The hiring adds new color to the unfolding drama.

Chuck gets into a physical fight with patron Jimmy, an event that catches the eye of Debbie, Jimmy's ex-girlfriend. The altercation reveals volatile relationships among patrons. It foreshadows the combustible conflicts to come.

Morgan learns that Diane's knitting needle was not the weapon used to kill Rachael. This finding redirects suspicion and deepens the mystery. The investigation expands as investigators seek a different signature.

A group of teenagers vandalizes the club with spray paint, only to be brutally murdered by an unseen assailant. The new killings widen the circle of victims and magnify the danger. The atmosphere within the club grows increasingly hostile.

The next day, Tom, a club patron, is murdered in the locker room, and later Jaimy is found hanged inside the club. The killings escalate, and the investigation intensifies. Morgan's sense of urgency grows with each new victim.

Morgan reveals Valerie's true identity and confronts Rhonda with the discovery. He attempts to kill Rhonda, believing she must be stopped. Rhonda defends herself and kills Morgan with a shovel.