Once upon a time, in 2019 in fact, there lived a girl called Mia. Mia, who was six and three quarters years old at the time, lived on a Spanish island with her mummy, Sonia, and their two Spanish cats. Even though they lived in Spain now, Mia was an English girl, as she was born in London. One day, when Mia and Sonia were visiting London again, Sonia called on her very close friend, Eldi, to see if she wouldn't mind babysitting Mia for a couple of days while Sonia had to travel overseas for work.