A struggling composer named Juan and his bride Ana become targets of spies while on their honeymoon. The spies want to get their hands on Juan’s latest score “Butterfly 2” as they believe that it contains a valuable secret formula.
| Production | Jesús Franco | Producer |
| Writing | Jesús Franco | Writer |
| Directing | Jesús Franco | Director |
| Sound | Fernando García Morcillo | Original Music Composer |
| Camera | Juan Soler | Director of Photography |
| Art | Carlos Spitzer | Set Decoration |
| Costume & Make-Up | Juana de la Morena | Makeup Artist |
