Europa has saved her people and begins her reign as queen on the moon Europa. But her transition is not a smooth one as she tries to adjust to an aquatic life and the loss of her father. She cannot forgive Kiijon for his part in her father remaining on Earth and turns her back on both him, and her people. The clan leaders are not willing to embrace a new Waters' queen and king and wait for Europa to show them she is worthy to rule. Many oppose her. But the clan leaders are not her only worry. A new adversary, Z, emerges to complete JeffRa's vow of revenge while an ancient enemy returns from their distant past, one they have no defense against