Paul Lazarus has created a miracle: a drug that restores sight to blind animals. In a clinical trial to test its safety in humans, it works spectacularly in two patients. Or does it?

Kathy Wright is depressed to find her eyes can now perceive images, but her brain can make no sense of them; her vision is all but useless. What’s more, she’s not the same Kathy; she’s become impulsive and unpredictable.

Unlike Kathy, Trey Osborne now sees perfectly. But instead of being happy, he’s grown unaccountably angry, with a hair-trigger temper that’s already turned lethal once. He’s a bomb ready to explode, and he wants answers. Who better to get them from than the drug’s creator?

But Paul Lazarus himself doesn’t know everything his drug is doing. He only knows that since inhaling it by accident, he’s had an affair with his assistant and a very public meltdown. His career in tatters, he can’t convince those running the trial that his drug is causing problems—they’re blinded by dollar signs.

As these intertwining stories build to a shocking climax, how many lives will the miracle drug wreck—or end?