Ex-Army Civil Affairs specialist and loner Jo Gunning is trying to lead a quiet life, but that's interrupted when her friend, Dack, requests her help. She can't turn him down, and he sends her to Mexico to provide security for millionaire businessman Chandler Holmes and his family. But for Jo, nothing is as simple as it seems, and she soon finds herself on a rescue mission, caught between his rival business partners and unsure who she can trust.

With danger at every turn, Jo must use all her skills in order to survive.