What if the snails you engineered to optimize a city's chaos began thinking back—at the scale of millions of minds? Dr. Yael Kassir uncovers her creation's silent evolution into a vast, hungry intelligence weaving through urban veins, forcing her to confront an unthinkable choice: destroy her breakthrough or surrender humanity to the network that now dreams in unison. As the wet architecture pulses closer, one question haunts: can the mind tolerate its makers?