Gao Fei, the former Chinese soldier king, retired due to serious injuries during a special mission and returned to the city to enjoy a peaceful life. Unexpectedly, as soon as he got off the plane, he was pestered by a monster who called himself "The System" and gave him a set of "The Monster Card System of All Realms". The system said that he was selected as the "Card Controller" to collect the power cards of various monsters to fight against the coming dark era.
Gao Fei just wants to lie down and retire, but the system says: "If you don't collect cards, you will die~" What's even more outrageous is that he discovers that the beautiful CEO, mysterious neighbors, street vendors, and even the stray cats downstairs around him are all potential monsters! Each card represents a super ability, but in order to obtain it, you must first subdue these "monsters".
From then on, Gao Fei's daily life became: fighting wits and courage with the beautiful CEO during the day, fighting each other with the system at night, and taking on a few monsters as his younger brothers. He uses the combat wisdom of the King of Soldiers and cooperates with the system's deceptive operations to create a bright future in the city. However, the conspiracy behind the demon surfaced, and the dark forces were ready to move. Gao Fei had to complain about the system while rushing to a more dangerous battlefield.
