The Fuentes are not the best family in the world. But what family is it? Work, school and routine have plunged them into a spiral of disconnection that seems impossible to stop. However, everything changes when the youngest of the group, Valentina, makes a wish for her ninth birthday. The next day, all the members of the family wake up with their bodies swapped: The father is in his wife's body, the girl is trapped in the grandmother's body, the teenage twins are not themselves... Chaos takes over. the family and, desperate, they ask themselves: Who is who? While the family faces crazy situations and hilarious circumstances, the Fuentes must learn to get under each other's skin and trust each other to turn the situation around. Will they be able to return to their original bodies and get their lives back?
| Actor | Role |
|---|---|
 Elena IruretaFernanda | Fernanda |
 Kira MiróAna | Ana |
 Salva ReinaDavid | David |
 Sofía OteroValentina | Valentina |
 Ana Jara MartínezLeire | Leire |
 Martí CorderoHugo | Hugo |
 Gracia OlayoMarina | Marina |
 Carlos IglesiasGonzalo | Gonzalo |
 Carlos ArecesSeñor Puig | Señor Puig |
 Terelu CamposDirectora Colegio | Directora Colegio |
 Hugo Martín CuervoVentura (as Martín Cuervo) | Ventura (as Martín Cuervo) |
 Aitor LunaAndrea | Andrea |
 Gonzalo de CastroMago Alejandro | Mago Alejandro |
 Paula PrendesAdela | Adela |
 Víctor PalmeroVíctor | Víctor |
| AAdrián BaenaDani | Dani |
 Antón LoferMédico | Médico |
 Omar BananaCamarero Parque | Camarero Parque |
 Mauricio MoralesGuardia | Guardia |
 Fernando GilAbogado Anozal | Abogado Anozal |
 Boré BuikaGuardia Civil Carlos | Guardia Civil Carlos |
 Sandra MartínGuardia Civil Sara | Guardia Civil Sara |
 Juan López-TagleJuez | Juez |
 Gorka AguinagaldeRobledo | Robledo |
 Daniel AriasRepartidor | Repartidor |
| NNerea MazoAriadna | Ariadna |
 Carla GrisAdolescente Fiesta | Adolescente Fiesta |
| AAugusta ThoenigTutora | Tutora |
| LLaura YannoneProfesora | Profesora |
 Daniela CasasNiña Coletas | Niña Coletas |