Our investigators are celebrating Halloween in the studio and will witness five spectacular performances: the Firefly, Lobster the Sheriff, Skunk Punkette, the Hedgehog and the Robot. Who will be unmasked?

This is the continuation of the duels! The Queen of day and night faces the Elephant Yéyé and the Robot challenges the Mandrill. Who will be unmasked?

Personalities from all walks of life become masked singers whose identity is kept secret. Guillaume Lemay-Thivierge and his panel of investigators (Sam Breton, Véronic DiCaire, Anouk Meunier and Stéphane Rousseau) must discover them.