The law of karma is the law of cause and effect. It works unavoidably when there is no consciousness -- when we are not present in the moment. When there is no consciousness, the past creates the future.
The law of Love supersedes the law of karma. It intervenes in the process by focusing in the present. In fact, one could say that Love is being fully present. When anything is initiated in Love in the present, the future of that reality will be purposeful, meaningful, loving and powerful.