Fashion model Zoe Mackay is strangled moments after leaving the catwalk, leaving DI Goodman and his team stumped. All of her colleagues, dress designer, three other models and the photographer have watertight alibis and the backstage area was securely guarded at all times. The only clue was a stocking clasped in the victim's hand. A series of catwalk photographs of the event from start to finish even provide an image of the actual murder.