Mister Frost (1990)

Mister Frost finds himself behind bars for murder after being caught entombing his victims in a garden. Despite his confinement in a psychiatric facility with strict security measures, it quickly becomes apparent that he harbors a chilling secret. As the staff grapples with his unsettling presence, the true nature of Frost's character remains elusive, leaving everyone questioning what lies beneath his calm exterior. His enigmatic demeanor suggests that he may not just be a simple killer, but something far more sinister.