Plot
Alicia is starring in a play about a psychopathic killer when she twists her ankle during rehearsals. The wardrobe mistress Betty takes her to a nearby psychiatric hospital for treatment. However, while they are there, a psychopathic killer makes an escape and hides in their car, killing Betty. The play’s iron-handed director decides to exploit the murder and brings the premiere forward. He locks the cast into the theatre and hides the key to force them to rehearse all night. What nobody realises is that he has also locked the killer in with them.