A reclusive and awkward nurse, Peggy, finds herself entangled in bizarre events when a new patient arrives at the hospital where she works. This patient, showing strange symptoms, eventually succumbs to a mysterious ailment, biting Peggy before dying. As she recovers from the encounter, Peggy notices peculiar changes in her own behavior and cravings, leading her to suspect that she has somehow contracted the same affliction. Meanwhile, tensions escalate at the hospital as staff members and patients begin to display unexplainable symptoms, and Peggy's newfound confidence draws the attention of Dr. Dox, a charismatic surgeon. Unbeknownst to them, a terrifying infection begins to spread through the confines of their once-ordinary workplace.

As chaos descends upon the hospital, Peggy finds herself torn between her growing affection for Dr. Dox and her inexplicable transformation. Her interactions with the other staff members grow tense, particularly with her rival, nurse Goodie, who becomes increasingly suspicious of Peggy's change in demeanor. A love triangle forms as relationships are strained by the escalating unrest within the hospital walls. With each passing day, Peggy struggles to maintain her sanity while confronting her primal instincts and battling internal conflicts. The outbreak’s growing threat threatens to engulf everyone in a relentless wave of horror. What was once a mundane environment of healing becomes a nightmare arena where survival and morality are put to a brutal test, setting the stage for a dread-filled crescendo as these intertwined lives hurtle toward an uncertain fate.