After reading the lyrics thoroughly I believe like the below post, it is a call for help. Seems to me the women who this person singing has fallen for has really fallen into a deep abyss and he's trying desperately to find her & save her if possible. By saving her, he would be by default saving himself. If he loses her completely he feels it would be like him dying himself. So if he saves her he saves them both or if he doesn't then in essence, they both die the same death.
After reading the lyrics thoroughly I believe like the below post, it is a call for help. Seems to me the women who this person singing has fallen for has really fallen into a deep abyss and he's trying desperately to find her & save her if possible. By saving her, he would be by default saving himself. If he loses her completely he feels it would be like him dying himself. So if he saves her he saves them both or if he doesn't then in essence, they both die the same death.