Documentary on the impact of coastal erosion in Portugal. In the winter of 2013-2014 the Portuguese coast was buffeted by severe storms and prolonged maritime unrest. The coastal areas have been in the news for the worst reasons and in recent years there has been a progressive advance of the sea in Portugal, calling into question the safety of people and goods — Portuguese beaches are losing sands! By various factors. And the information that comes to us does not seem to be enough to understand all these phenomena. Making it better and accessible to all is essential at a time when the scientific community is debating the problems of erosion and its causes.