In a terrifying twist on medical science, a team of researchers harnesses nanotechnology to miniaturize a shark, hoping to inject it into a patient’s bloodstream to combat a rare blood disorder. But when the microscopic predator turns from cure to carnage, a desperate crew must shrink themselves and venture into the human body, navigating the dark, pulsing corridors of veins and arteries to hunt down the most dangerous creature ever conceived. As the clock ticks and the body wages war, they realize that inside, no one can hear you scream—and the smallest shark may be the deadliest of all.































































