The secret weapon developed by the man Cavanaugh is assigned to protect is like Kryptonite to the former Delta Force officer turned security guard--it multiplies the effects of adrenaline, a hormone associated with fear, so it incapacitates instead of energizing him. A lot of people want Daniel Prescott's secret, but Cavanaugh, who's felt the drug's effects, wants his antidote. When Prescott disappears after causing the death of the Global Protective Services team charged with keeping him alive, Cavanaugh and his wife Jamie go after him in a high-speed chase that traps them between government agents and foreign operatives each racing to find the scientist first and kill him before he can use his formula on them.