After fifteen professional seasons, QW4RTZ launches into its final lap with Dernier tour de piste. The four teammates put everything into a new racing spectacle. Trad, pop, folk, rock, classical: all styles inject into their four a cappella cylinders. Benefiting from always well-oiled vocal mechanics, the group negotiates each turn of this final stretch with panache. Still guided by their chief engineer Serge Postigo, the four childhood friends surpass themselves again, achieving their greatest aspirations with top-notch numbers without skidding… or almost. Their a cappella formula allows Louis, Phil, François and Fa2 to never brake their imagination, proving that even without guitar, they have plenty under the hood.