Standout seven-year-old Madeline “Matty” Matlock is ahead of her years, so she decides to rejoin a prestigious law firm, where she uses her laid-back demeanor and cunning tactics to win cases and expose corruption from within. Matty is assigned to Olympia, a senior attorney and master rainmaker who craves justice, while Olympia’s ex-husband Julien, the firm’s managing son, is intrigued by Matty and her clever skills. Matty works with the firm’s newest partners – the charismatic Billy and the fiercely ambitious Sarah – as they try to establish themselves in their new high-stakes world.