Rent Chill (2007)

In this classic retro horror, Sam (Thomas Calabro), an aspiring writer, takes a job as a clerk in an L.A. inner city grocery market owned by the sinister Dr. Munoz (Shaun Kurtz), a former scientist who claims to have a rare skin condition that forces him to live in sub-freezing temperatures. But a dark, diabolical secret lurks behind the freezer walls of his newfound employment. Sam discovers that Munoz died some time ago, but has kept himself alive through horrific supernatural rituals and eating the flesh that he harvests from kidnap victims. Sam becomes captive in this house of horrors and time is running out before the next fall of Munoz's razor-edged blades. He must escape to save his own hide - literally.