Rio: Rainbow Gate!

Mint Clark arrives at Howard Resort with her multimillionaire grandfather. Tired of amusement parks and beaches, Mint spots the beautiful dealer Rio, also known as the "Goddess of Victory." While Mint is captivated by her smile, a man named Orlin Dunhill appears before them and attempts to steal Mint's precious stuffed bear. Rio must play poker to save Mint.

Newbie dealer Ania Fortuna arrives at Howard Resort. Assigned to train Ania, Rio is impressed by her card shuffling skills. However, she is exceptionally clumsy...Meanwhile, the arrogant Elvis shows up at the resort casino with an entourage of women. As gate holder, one who holds one of only thirteen rare gate cards in the world, he challenges Rio, also a gate holder, to a duel for her card.

Rio's childhood friend Rina arrives at Howard Resort as a new dealer. Delighted by their reunion, Rio shows her around the island. While taking in the various sights together, Rio recalls the time they spent together as children... After spying on the pair get along so well, Howard creates a new event to bring excitement to his resort: a disc shoot out between Rio and Rina!

Sky Resort at the peak of the island's mountain is finally open! Howard orders Rio and the others to work at Sky Resort. From the vast casino floor to the hologram theater and the thrilling extreme slider, the resort is full of various cutting edge attractions. They cannot believe their eyes when they meet Linda, the robot dealer of the flying resort. However, a group of suspicious figures have their eyes on Rio during the grand opening ceremony.

The person behind Linda's hacking is the female casino owner rapidly acquiring power through force, Cartia. Seeking to make Howard Resort her own, she challenges Rio to a gate battle against her own employee, Jack. Without even any knowledge about the appearance of her opponent, Rio cannot hide her anxiety as the battle approaches. While trying to help Rio, Mint meets a young boy with unusual powers.