1950s Madrid: The agoraphobic Montse raised her now 18 y.o. kid sister. The upstairs neighbor falls down the stairs and breaks a leg. The crazy Montse takes him in.

A young pregnant woman named Mia escapes from a country at war by hiding in a maritime container aboard a cargo ship. After a violent storm, Mia gives birth to the child while lost at sea, where she must fight to survive.