The film takes place three years after the events of Raya and the Last Dragon as Chief Benja and his daughter Raya have reached an agreement with the people of Fang as they would have peace in their lands as he and Chief Virana have agreed that the best way to achieve it is for a marriage to take place. When Raya tells Benja to marry Virana to unify their lands, Benja approves to say yes. Benja also tells Raya that her duty as princess of Heart is to see for their land and for their people and they have arranged this wedding to be hers with Princess Namaari or the Spine Chief on her 21st birthday. Meanwhile, the dark dragon, Quynh, half dragon, half Druun, returns to Kumandra from the underworld as he brings the Druun back to life and discovers the hidden kingdom known as Horn then he declares his revenge on the people and dragons of Kumandra, including Sisu and her brothers and sisters by war. It's up to Raya and her new fearless friends to set the dark dragon free from his evil manner once and for all.
