There is a world where cards are a commodity. From sealing powerful supernatural beings, godly weapons, these cards can also control the weather and the four elements.
Those who master the power of the cards are called Summoners.
Unknowingly, You Chu transmigrated to the cards system world. As he opened his eyes, he found himself about to be sacrificed in a cult and the only thing that could save him now was the card drawing chance from the system.