At the Besòs Mar metro station lives an adorable prawn who copes with modern life as best she can: she swims on the platform, basks in the artificial sun and remembers with nostalgia the old days on the beach with the other shrimps. Deep down, she knows that she lives in a scenario where good fish is no longer what it used to be and everything has become a little dead. But maybe everything changes when someone appears on the other platform of the Besòs...