Han Chen, a street gangster who was surrounded by enemies to protect his brothers, accidentally activated the "Chaos Card Achievement System" - completing the achievement tasks released by the system (such as defeating enemies and collecting cards) can obtain card drawing times, and draw attack, defense, auxiliary and other types of fantasy cards (levels are divided into common, rare, epic, legendary, mythical). The protagonist starts by resolving street disputes, and gradually gets involved in the battles between hidden fantasy forces in the city (such as "Xuanmen" and "Ghost Alliance", etc.). He uses card skills to defeat snobbish relatives, defeat arrogant fantasy children, and resolve urban crises. Finally, he becomes the "card god" who rules the urban fantasy world. In the process, he goes from conflict to cooperation with the cold female agent Jiang Xue, and gains love and brotherhood.
