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, Aquaman forges an alliance with his imprisoned brother. They must protect the kingdom.

Sean Anderson partners with his mom’s husband on a mission to find his grandfather, who is thought to be missing on a mythical island.

A young linguist named Milo Thatch joins an intrepid group of explorers to find the mysterious lost continent of Atlantis.