Maca(MaríaValverde),30yearsoldandclumsybynature,makesthemostoflifeandstrivestobehappy.Maca'stalentiswastedworkingasanassistantforanoppressiveandterrifyingfashioninfluencerandshespendshertimewithguyswithwhomshenevermanagestoestablishanemotionalbond.TogetherwithJimena(ElísabetCasanovas)andAdriana(SusanaAbaitúa),hertwouniqueandlovablefriendswhoarealwaysreadytodowhateverittakestomaketheirproblemsnotseemsobad,MacahasmanagedtomakeMadridacitywhereeverythingispossible.Everythingseemstobegoingwelluntilhe-who-must-not-be-namedcomesbackintoherlife.Leo(AlexGonzález),theloveandbiggestmistakeofherlife,themanwhotoreherheartapart,obliteratedherself-esteemandherfaithinmen,comesbackintoherlifetoturneverythingupsidedown.Macahastriedtoforgethim,butnowshehastoacceptthathehasreturnedandfacetheemotionsshehaslockedawaytodealwiththeunforgettablememoryofwhatcouldhavebeenandneverwas.OldwoundsarereopenedandMacawillhavetobebraveandconfrontherconflicts,fearsandinsecuritiesinordertofinallytakecontrolofherlife.

Itseemssimple:anegg+sperm=oneembryo.Butifyourspermis"few,vagueandabnormal"andyourwomanispremenopausalatage37,thingsstarttogetcomplicated.