Rescuing someone is read as care, courage or the wish to protect. Dream books ask who is rescued, since it may be a side of yourself that needs saving.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.