MarsetAvriltakesplaceinaMontrealofthefuturewhenhumanityisreadytomovetoMarsBut,noteveryoneisreadytogoJacobObus,acharismaticandbelovedseptuagenarian,leaderoftheanticyberneticmovement,takesprideinslowingdowntimeHeplayscaptivatingmusiconinstrumentsinspiredbywomen’sbodiesanddesignedbyhisfriend,ArthurIt’swhenJacobandArthuraresmittenbyAvril,ayoungandshortwindedphotographer,thatthetruenatureoftheoldsexsymbolisrevealedAftermakingloveforthefirsttimeinhislife,JacobisreadytoleaveforMarsinsearchofhismuseInthemidstofeverythingarrivesEugèneSpaak,inventor,cosmologistandArthur’sfather,whomaintainsthatMarsisonlyachimera