Yu-Gi-Oh! 5D's is set in the future in Neo Domino City. Seventeen years prior, a reactor called Moment within the city malfunctioned and caused a great earthquake that split the city in two parts: Satellite, the rundown and poverty-stricken part, and Neo Domino City, the wealthier and urban part, with access from Satellite to Neo Domino being strictly forbidden. Yusei Fudo, an aspiring duelist from Satellite, builds his own D-Wheel, but his best friend Jack Atlas betrays him and steals his vehicle along with his most precious monster, Stardust Dragon, escaping to Neo Domino. Two years later, Yusei builds another one and secretly travels to the city to win back his Dragon. Jack has made a name for himself and his monster, Red Daemon's Dragon, as the current Riding Duel King in Neo Domino City. Yusei and Jack face each other in a Riding Duel, and Yusei is able to regain control of Stardust Dragon. As Stardust and Red Daemon's Dragon battle, Yusei and Jack's arms glow red, a third red dragon appears, and brings an abrupt end to the fight. This attracts the attention of Rex Goodwin, the head of the Public Security Maintenance Bureau, who reveals to Jack a five thousand year old secret, involving the "People of the Stars" (星の民, Hoshi no Tami), a pre-Incan civilization, the "Crimson Dragon" (赤き竜, Akaki Ryū), and "Signers" (シグナー, Shigunā), identified by a red birthmark on their arm that represents a part of the dragon. Goodwin also reveals that Jack and Yusei, along with child Duelist Luca and Psychic Duelist Aki are descendants of them and are destined to face the Dark Signers, duelists resurrected from the dead to serve the evil Earthbound Gods. The Signers head to Satellite to face these foes who consist of: Rutger Goodwin (Rex's brother, a former Signer with the dragon's Head mark and leader of the Dark Signers), Kyosuke Kiryu (a former friend of Yusei, Jack and their friend Crow Hogan), Demak (the one who stole the Ancient Fairy Dragon card until Luca, with her twin brother Lua's help, wins it from him), Misty Lola (a model who blamed Aki for the death of her brother Toby, until she discovers Divine, Aki's former friend and leader of a psychic duelist organization, was the true culprit), Bommer (who blamed Rex Goodwin for his village's disappearance until he discovers the Dark Signers were responsible), and briefly Carly (a blogger with feelings for Jack). After their defeat, Rex Goodwin is revealed to have become a Dark Signer and uses his brother's severed arm to become a Signer as well. Yusei, Jack and Crow then face him in a Riding Duel in order to stop him and the released King of the Netherworld from finishing off the Signers and destroying the world. Before the final attack, Yusei gains the Head mark while Crow gains his former Tail mark, making him a Signer. With the power of the Crimson Dragon and Yusei's Saver Star Dragon, he defeats Goodwin who, along with Rutger, sacrifice themselves to destroy the King of the Netherworld and revive the Dark Signers as normal people again.