The speaker's lost a girl a long time ago, and she is way out of touch, but the speaker's still determined to find the girl once again, by calling her into the "wild," that is, the vast expanse of area the girl could be in, hence the title, "Call of the Wild."
The speaker's lost a girl a long time ago, and she is way out of touch, but the speaker's still determined to find the girl once again, by calling her into the "wild," that is, the vast expanse of area the girl could be in, hence the title, "Call of the Wild."