In the heart of Austin, Texas, where tech empires rise alongside live oak trees, twin sisters Morgan and Megan Smith are thrust into a deadly game of secrets, silicon, and sisterhood. Morgan, a meticulous homemaker with a talent for cryptography, clings to the illusion of her perfect marriage—until her husband, Landon, vanishes, leaving behind a trail of encrypted lies. Megan, a brash investigative journalist with a knack for chaos, would rather chase corporate conspiracies than confront her own fractured past. But when Landon's disappearance exposes Veridian Tech's AI weapon—a neural parasite masquerading as progress—the estranged sisters must reunite to survive.

Posing as each other, hacking smart homes, and brawling through Austin's glittering underbelly, Morgan and Megan unravel a plot that hijacks human minds. As they face cloned doubles, a resurrected mother's AI ghost, and Landon's chilling transformation into Codex Aurora's prophet, the twins confront their greatest threat: the truths they've buried about themselves.

Sharp, Southern, and sinister, Ms. and Mrs. Smith blends The Girl with the Dragon Tattoo's grit with Steel Magnolias' tangled bonds. A thriller where sisterhood is both a weapon and a weakness, and the only code you can't crack is the one written in blood.