You set me onto something MZA! I think the song as a whole is about junks and drug users. It's partly a lament due to it stating there is no help for them ("The weak are screaming for the captain but the captain ain't here") and partly a judgement, because when Nuno sings "And if the devil's at your door you leave it open, let him in" he's probably refering to the fact that all drug users once willingly started the path down to becoming a junkie.
You set me onto something MZA! I think the song as a whole is about junks and drug users. It's partly a lament due to it stating there is no help for them ("The weak are screaming for the captain but the captain ain't here") and partly a judgement, because when Nuno sings "And if the devil's at your door you leave it open, let him in" he's probably refering to the fact that all drug users once willingly started the path down to becoming a junkie.