In this lighthearted DCEU entry, Billy Batson is a trouble-making fourteen-year-old living in a foster home in Philadelphia, having been abandoned by a young mother he’s been searching for since she left him at a crowded carnival many years prior. One day, the sleuthing prankster gets transported after an act of bravery to another realms to meet a powerful and reclusive wizard, who has been on a long-term search for someone pure of heart to pass on his magical powers to. The wizard bestows upon Billy the power to turn into an muscle-bound, adult-bodied, costumed superhero by using his name of “Shazam!” Along with his superhero-loving best friend in the foster home, Freddy, the still adolescent-minded Billy has plenty of fun in discovering his new powers and all of the things he can do with them, from buying beer to giving the school bullies some comeuppance. However, things get serious with the emergence of Dr. Thaddeus Sivana, once past over as unworthy by the wizard and seeking to usurp them from Billy, along with the cabal of demon-like possessors within him, representing the Seven Deadly Sins who plan to come to power with Sivana as their vessel to the outside world.
The setting starts sometime in the 1980s, where we find Atlantean queen Atlanna (Nicole Kidman) coming up to the surface in the state of Maine to get away from an arranged marriage, seeking a bit of sanctuary and time to heal in a lighthouse run by a human named Tom Curry (Temuera Morrison). The two unlikely partners fall in love, eventually leading to a son, Arthur Curry. The kingdom of Atlantis is not pleased with Atlanna’s apparent defection to the land, sending out their soldiers to claim her back, culminating in Tom being left alone to raise the boy himself as a human, except one with the powers of Atlanteans in his DNA, including an ability to talk to and command all forms of marine life.
We fast forward to Arthur’s adulthood, known to the land-dwellers as “The Aquaman” after a series of public acts of heroism, one including taking down pirates that includes future nemesis Black Manta (Yahya Abdul-Mareen II). However, Arthur has to become a savior to his adopted people when the current rule of Atlantis, Arthur’s half-brother Orm (Patrick Wilson), is looking to mount a war with the land walkers who continue to pollute the oceans, seeking the assistance of King Nereus (Dolph Lundgren), one of the leaders of the ‘seven seas’ needed to approve. Nereus’s daughter Mera looks to recruit Arthur’s assistance in staving off the uprising from his brother’s charge. Arthur must go undersea to make his presence felt, but the opposite of a fish out of water in his new environs in the Atlantean realm, especially when the situation boils down to a mano-a-mano battle between Arthur and Orm on his home turf (or non-turf, as it happens to be).