It is an adaptation by Bigas Luna, Carles Porta and Carmen Chaves of the well-known novel Mecanoscrit del segon origen by the Spanish writer Manuel de Pedrolo.
[1] Alba is a 20-year-old girl who lives with her father of English origin in a farmhouse in a place near the city of Lleida.
They have lived there for eighteen months, after Alba's mother died of cancer in London and her father's decision to move to his wife's birthplace.
One day as Alba is returning home on her motorbike, she sees three boys throwing Dídac into the lake.
When they come up to the surface, everything around them has been reduced to ruins by a solar magnetic storm (or, in one version of events, an alien invasion).