This is an amazing archetypal dream with very clear symbolic meaning. The temple is your heart, the caretakers are the positive godlike energies and forces. The tall, dark beings who are planning to attack are the negative rakshasic, adverse forces that want to take away the daughter of the priest. The daughter who is apparently important for the conquest to materialise is your developing psychic being that is helped by the Mother to escape from the attack of the adverse forces. The dream does not explicitly indicate what impact this inner event may have, if at all. In all likelihood the attack will not happen. But it does mean that you are marked out for some work of the Mother and for the spiritual life. It is important therefore to focus on strengthening the psychic being through reading and contemplating on the Mother and Sri Aurobindo. Keep Her always in your heart and call Her Name as often as you can. I think the proposed attack was not on your body but on your inner life. May Her Grace surround your life.
Affectionately,
Alok Da