Two models, eager to make their names publicised and internationally-known in France, are killed in a dramatic staged monorail-train crash, while en route to the countries' capital Paris, and are rebuilt by the Mysterons, in a bid to assassinate Andre Verdain, owner of the ""House of Verdain"", a top modelling & fashion design company, which keeps his real occupation as the controller of the European Area Intelligence Service a confidential secret.

Captains Scarlet and Blue, along with angels Symphony and Destiny are assigned to act as French newspaper photographers and stunning, attractive models, in order to guard Verdain from any Mysteron attacks, but they are absolutely oblivious of the presence of the two female model doppelgangers.