The movie Liar Game: Reborn follows the storyline of the popular manga and anime series of the same name. After the original Liar Game office was shut down, a new one is revived under the leadership of Omega, a mysterious figure who holds a grudge against Shin'ichi Akiyama, the genius gambler who had previously defeated the Liar Game.
To exact revenge on Shin'ichi, Omega sets up a new Liar Game with only one target: Shin'ichi himself. Shin'ichi initially refuses to participate, but he is forced into the game when he meets Shinomiya, a new heroine who is a victim of a Liar Game scam. Together, they are thrown into a twisted game of deceit and manipulation where they must compete against 19 other players for a grand prize of two billion yen.
Alice, Shin'ichi's nemesis from the previous Liar Game office, is also a part of the new game. She sets up the traps and chooses the players to compete against Shin'ichi and his allies. As the players navigate through the game's various rounds, they are subjected to psychological torture and mind games that quickly escalate beyond their control.
In the end, Shin'ichi must use all of his wits and skills to outsmart his opponents and uncover Omega's true motive for reviving the Liar Game. With the help of Shinomiya and his allies, he attempts to outplay Alice and her twisted games, while ultimately uncovering the truth behind the dangerous and secretive Liar Game office.