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 her child while lost at sea, where she must fight to survive.

Set in a dystopian future, Spain has been turned into a dictatorship, where its government plans to eradicate children, pregnant women, and the elderly to deal with the lack of resources.

The plot follows a pregnant woman separated from her husband while trying to flee the country to Ireland. She then finds herself trying to survive inside a shipping container in the heart of the sea.