At St. Dominic's Academy power isn't earned through grades - it's earned through gambling, it's how power is won and reputations are built. The school's elite are all members of the feared Student Council, where only the strongest remain. Mary is a gambling queen - sharp-tongued, beautiful, cunning. She doesn't have friends, but she does have allies. Riri - the silent, unreadable girl who rarely speaks, barely gambles, and always lingers in the shadows of her older sister, the Student Council President. Mary and Riri have a strange relationship: not quite friends, not quite strangers. There's a tension between them - cold glances, soft silences, unspoken respect. Mary doesn't get why Riri never gambles. Riri doesn't explain. Still, they work in sync on the Council - until one day, they don't.