In economic crisis, five friends spend a hot summer in Madrid hoping to fare better in September, the month in which reactivates the city and the job offers. The finding on a plot of a bag with 20 million pesetas in bills of the old pesetas change the course of events ...

Galicia, northern Spain, January 2, 1921. The steamship Santa Isabel, sailing towards Argentina with more than two hundred emigrants on board, sinks off the coast of Sálvora Island. Three island women, María, Josefa and Cipriana, who have bravely set sail aboard a fragile skiff to save the shipwrecked, are treated as heroes by the cynical authorities; but León, an inquisitive and tenacious Argentinean journalist, starts asking uncomfortable questions.

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.