When an air stewardess checks into an hotel, she discovers that a mysterious man clad in black can do more than deliver the "Milk Tray", and she ends up dead... The plot thickens when her colleague "Sue" (Ann Bell) arrives in the same hotel to discover that the murdered woman was impersonating her - and so she could have been the real target? Scared, hysterical even, she sets out to try and get to...
