ðə fˈɪlm ɪz ɐbˌaʊt ɐ dʒˈɜːmən nˈɑːtsi spˈaɪ ɪnðə juːnˈaɪɾᵻd kˈɪŋdəm dˈʊɹɹɪŋ wˈɜːld wˈɔːɹ ɹˌoʊmən tˈuː hˌuː dɪskˈʌvɚz vˈaɪɾəl ˌɪnfɚmˈeɪʃən ɐbˌaʊt ðɪ ʌpkˈʌmɪŋ dˈiːdˈeɪ ɪnvˈeɪʒən ænd hɪz ɐtˈɛmpt tə ɹᵻtˈɜːn tə dʒˈɜːməni wˌaɪl hiː ɪz stɹˈændᵻd wɪð ɐ fˈæmɪli ɔnðɪ ˈaɪsəlˌeɪɾᵻd fˈɪkʃənəl stˈoːɹm ˈaɪlənd, ˈɔf ðə kˈoʊst ʌv skˈɑːtlənd.
The film is about a German Nazi spy in the United Kingdom during World War II who discovers vital information about the upcoming D-Day invasion and his attempt to return to Germany while he is stranded with a family on the isolated (fictional) Storm Island, off the coast of Scotland.