Cards are weapons in this world, and different cards bring different powers... Bai Li, his grandfather passed away due to illness, but he left two swollen letters for him. One was written by his grandfather and the documents of a villa, and the other contained a bank card and a unique "iron" card and... After "accidentally" stepping into the card world, he discovered that there are still many "wild cards" on the earth that have not signed a contract, and the probability of human beings signing a contract is less than 1%.
Once moved..."