Abby Russell, an alluring and dedicated nurse, leads a double life. By day, she is a compassionate caregiver in a busy metropolitan hospital. By night, she prowls the city, luring unfaithful men into her deadly trap as she exacts her twisted form of justice. Abby's calm and composed exterior is a stark contrast to her violent nighttime activities. When new nurse Danni begins working at the hospital, Abby takes her under her wing. However, Danni soon becomes suspicious of Abby's motives and her overly protective and manipulative behavior.

As Danni delves deeper into Abby's life, she uncovers troubling secrets that put her in danger. Their relationship turns from mentorship to obsession as Abby's dark side becomes increasingly apparent. Tensions rise, and Danni must navigate through a web of lies and deceit to protect herself and expose Abby's true nature. The tense atmosphere builds to a crescendo as Danni faces the truth about Abby and fights to break free from her grasp.