Mallory Greenleaf is finished with chess after the game devastated her family four years ago. Now, her focus is on supporting her mom and sisters through a dead-end job. However, a stunning, viral victory against the reigning world champion, Nolan Sawyer, thrusts her back into the world she tried to leave behind. Mallory is drawn to the enigmatic strategist, Nolan, as her unexpected win opens the door to much-needed cash prizes. As she rapidly moves up the ranks, Mallory struggles to shield her family from the potentially destructive game that initially ruined everything.