On the island of Regalo, a group of supernaturally empowered mafia-like guardians known as the Arcana Famiglia protects the populace from any who might threaten them. The members of this organization, having formed contracts with tarot cards, each wield distinct abilities, such as immense strength, invisibility, or the power to perceive someone's innermost thoughts.
Mondo, their leader and the "Papa" of their family, declares at his birthday celebration that he will soon step down. He intends to host the Arcana Duello, a tournament where the victor will earn the title of Papa and any wish they desire. However, more than just a title is at stake: Mondo also decrees that the winner will marry his daughter, Felicità. Furious at this decision, the determined Felicità chooses to join the competition herself, seeking to forge her own path. As Felicità fights for her independence, her rivals compete for her affection.