Basketball champion and global icon LeBron James wishes for both of his sons, Darius and Dom, to follow in his footsteps, but Dom, a child prodigy in computer software, instead dreams of becoming a video game developer. LeBron's wife, Kamiyah, advises him to respect Dom's wish. While showing an interest in Dom's game, Dom discovers a glitch in his character after performing a specific move which causes the character to be deleted, to his chagrin. Later, LeBron is invited with his family to the Warner Bros. studio and is offered to become a movie star, but LeBron dismisses the idea, while Dom shows an interest in the studio's software's, particularly its A.I., Al-G Rhythm. Dom expresses an interest in a future with Warner Bros, leading to an argument with his father over basketball camp where the two storm out. Al-G, who has secretly become self-aware and desires more recognition from the world, lures the two to the basement and traps them inside a virtual reality, where he takes Dom prisoner and orders LeBron to assemble a basketball team made from fictional characters owned by Warner Bros to challenge him to a game in a day's time, telling him that he will only be released if he wins, and sends him through the virtual space where he lands in Tune World. Meanwhile, Al-G accosts Dom and begins to turn him against his father by playing on his resentments and helping him develop and upgrade himself and his game, which he secretly intends to use against LeBron.
