Mareas vivas is located in a ficticious seaside village in Galicia, northwestern Spain, and explores the lives of the local people.

In the 1980's, Pilar, an ordinary woman, married, about forty years, discovers that one of their three children are addicted to heroin. After an initial period of uncertainty, Pilar contact with other parents in similar situations who come to a precarious Civic Center helps the addict, but soon realizes that many things have to change in and out of home so your child can be saved. Thus was born the desire to do more than complain and starts along with other parents, but especially mothers, an arduous journey of withdrawal of drug trafficking in Galicia.

The story based on an idea by Antón Reixa and inspired by a real case, describes the adventures of a modest football team that, due to various ups and downs, has been sponsored by a girls club. What follows, is the imaginable scandal on the part of the traditional sector of the town, and the subsequent reaction of "living forces." The three main ingredients of this comedy are soccer, with a constant presence in our lives, prostitution and other activities condemned by established morality, and love.