One day at the end of the 1800s, 14-year-old Lise’s life is changed forever. She is the eldest of her siblings, the first in her family to go to school and full of hope and confidence in life. But when her mother goes into labour, it quickly appears that something is wrong. As night falls and the labour progresses, Lise begins to understand that a day that began in childhood might end with her becoming the woman of the house.

At Santa Claus School, the principal has called a meeting. Lucia, her parents Julius and Claudia and everyone else at school are excited. But the tension is replaced by a shock when the headmaster cancels Christmas. He seems confused, and it soon becomes clear that he is trapped in a Christmas trauma from his younger days as Santa Claus. Lucia sets out to find out what has happened and with the help of the younger student Elias and a magical time machine, she travels back in time in the hope of saving Christmas.

Asta fights a daily battle to conceive a child before her biological clock rings out.