The lives of six girls belong to different worlds although connected to each other through a doll called Molly, whose existence dates back to 1976, when she appeared among the rubble of the great fire of the San Carlos orphanage, in northern Spain

Spain, 1949. Narcisa, a novice, arrives at an old convent, converted into a girls' school, to work as a teacher.

After taking over a ramshackle little hotel, bought by mistake at an auction for an exorbitant price, the Garcias live a new adventure, helped, much to their regret, by a group of gifted children who are staying at the hotel to attend the Talent Final. Together they will confront the mafioso Benito Camarena, who will try to snatch the loot hidden in the hotel from the Garcias.

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?