Someone wants Mackenzie Stone dead. After four attempts on her life, the Stone Foundation hires her a bodyguard – Diego Lopez, the man who’d thwarted the most recent attack. Mackenzie suspects the threat is coming from inside her organization, so Diego poses as a college friend researching foundations. Their 24/7 forced proximity only intensifies the attraction simmering between them. As their need for each other begins boiling over, they struggle to focus on the growing threat.