An autistic boy and his father who returns from war with PTSD help each other find peace with the help of martial arts and music. As a man, Rob also learns to follow his heart when he finds a woman who loves him just as he is.

Black Manta seeks revenge on Aquaman for his father's death. Wielding the Black Trident's power, he becomes a formidable foe. To defend Atlantis, Arthur (Aquaman) forges an alliance with his imprisoned brother. They must protect the kingdom.