Expresses the idea of 'cannot help but...', 'cannot leave it as it is' or 'must do something'.
Long explanation:
The ずにはおかない grammar point conveys the sentiment of an inevitable action or an emotional compulsion to do something. When you must do something and you can't let it be without doing it, ずにはおかない is used. The verb is usually used in its base form before ずにはおかない.