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