The end of the world, as predicted by the Mayans, is coming and Nacho (Fernando Ramallo) decides to hide away in a bunker on 27/12/2012. He doesn't know what is happening outside and is afraid to leave. He writes in his diary and films his experience in the bunker, keeping a record of his days. When he realizes strange events are happening outside he tries to figure out what has passed, from his knowledge of theories about the end of the world. Eventually he will find out that the Apocalypse has come. But in what form?