Plot synopsis: Denmark’s Radio Mercur became the first commercial offshore radio station to broadcast in Europe when it began transmitting from the ship Cheeta in international waters near Copenhagen in 1958. Inspired by true events, its journey from bold beginnings to eventual decline is now being reimagined through following the story of a group of passionate music enthusiasts. Their mission was to challenge the state-run radio monopoly by delivering fresh pop and rock ’n’ roll sounds to a youthful audience eager for new music.