Gatti rossi in un labirinto di vetro

A group of American tourists, including Mark Burton (John Richardson) and his secret mistress Paulette Stone (Martine Brochard), are stalked by a killer in Barcelona. The victims are found with their eyes removed, and the police, led by Inspector Tudela (Andrés Mejuto), must figure out who among the tourists is the killer. The mystery unfolds as the series of murders continues, with each victim leaving behind clues about the perpetrator's identity. Ultimately, the killer is revealed to be Paulette, who had lost her eye in a childhood accident.