MarsetAvriltakesplaceinaMontrealofthefuturewhenhumanityisreadytomovetoMars.But,noteveryoneisreadytogo.JacobObus,acharismaticandbelovedseptuagenarian,leaderoftheanti-cyberneticmovement,takesprideinslowingdowntime.Heplayscaptivatingmusiconinstrumentsinspiredbywomen’sbodiesanddesignedbyhisfriend,Arthur.It’swhenJacobandArthuraresmittenbyAvril,ayoungandshort-windedphotographer,thatthetruenatureoftheoldsexsymbolisrevealed.Aftermakingloveforthefirsttimeinhislife,JacobisreadytoleaveforMarsinsearchofhismuse.InthemidstofeverythingarrivesEugèneSpaak,inventor,cosmologistandArthur’sfather,whomaintainsthatMarsisonlyachimera.