Sol Rock is the unassuming support member of Black Tiger, a celebrated party of young prodigies known as the Miracle Children. While his companions bask in glory, Sol is treated as useless and is ultimately expelled by the party leader. What no one realizes is that Sol possesses a hidden special talent called Player, a godlike ability that can bestow overpowered skills and incredible stat boosts onto his allies. The true source of the Miracle Children's strength was Sol all along.

Only two members of his former party understand this: Reen, the stalwart defender known as the Iron Wall, and Julia, the gifted healer called the Saint of Healing. Both choose to leave Black Tiger and join Sol. Free from the constraints of a party that never appreciated him, Sol decides to fully unleash his potential. His goal is no longer to support others but to create the strongest party in the world. He is given five mystical cards, each one depicting a legendary monster powerful enough to challenge the world on its own. Sol embarks on a journey to find and befriend these five monsters and fulfill his dream.

In his travels, Sol gains a loyal servant named Luna, which allows him to communicate with royalty on an equal footing. However, he learns that a powerful Holy Church is seeking a way to eliminate him. Forced to seek even greater power, Sol ventures into a forbidden and taboo territory. There, fate leads him to a young girl who is actually another legendary monster: Aina noa la Avalil, the Captive Elven Queen. By saving her, Sol makes a powerful enemy of Istekario, a military superpower, setting the stage for a much larger conflict.