Mary Bromfield, as a young girl in kindergarten she has many friends and is liked by the teachers. Even at home her parents always enjoyed her company. Especially her dad who is a well known scientist often refers to her as "Madam Charming" and likes to bring her to work as she is met by Doctor Thaddeus Sivana, who is her father's mentor and friend. Displaying an interest in science as Mary wanted to use her knowledge to help people like her father
However, as she grows older her friends grew jealous of her and became distant, and at home her mother often argues with her father due to trouble at her workplace, but she is often talked by him to see the positives and not worry. Until one day she received a phone call that her father died and broke Mary into tears
At age 11, While still the smartest Mary is often alone as her former friends often made fun of her as she's been known as a nerd. Even at home she hasn't gotten well with her mother as she's working overtime. Feeling upset she leaves home at the night to walk around and think. Until she spots a car being crashed across a metal bridge. Mary quickly rushed over to see a man unconscious with a young child on the back seat as she went in ad tries to get them out, but as she got the man out the car moved forward to the edge as the metal bars closed the door, with Mary's coat being caught as she was dragged down to the sea. Unable to get out as the car moves fast down Mary realizes that this is now her end as she thinks back all the things that has happened to her, with only her thoughts about her dad. Suddenly, a bright light appeared and Mary was saved as she ends up in an unknown temple with hieroglyphics and marking as she meets the Wizard, who he reveals to her that she's one of the candidates that he and few others have selected to be their champion as he reveals his magic. Which shocked her as she has never witnessed real magic before. Seeing her act of heroism, the Wizard takes Mary to the "Rock of Eternity" and say the word "SHAZAM". As she said those words, a bolt of lightning struck her and was shocked to see that she has transformed into a grown woman, as the Wizard introduced her to the other magic users who offered to teach her
Now as a master of both magic and science, Mary was shocked to realize that it has been only a month and returns home. Only to see the town being attacked by a demonic beast. Using the knowledge she has gained, Mary defeats the beast and finds and confronts the man responsible for all of this. Doctor Sivana. Who has been corrupted by an evil stone, and murdered her father for his life-force to charge it's power, and is bent to unleash a terrible darkness and cover the earth. With pure knowledge and will, Mary stops and defeats the darkness, but Doctor Sivana was left lobotomized in the process. Changing back to her original form, Mary returns home to find her mother distraught and crying to see her daughter return, and her former friends there completely worried for her. Surprising Mary but made her happy
One year later, a 12 year old Mary now full of confidence now heads off to defeat any evil that stands in her way as the champion of magic as the world will now know her name. "Madam Thunder"