When Cate Morgan snaps a photo linking a corrupt South American politician with the leader of a drug cartel, her mercenary father leads a team to rescue her - only to get shot in the process. As Morgan's operatives rally together on a revenge mission, they're faced with new alliances and old heartaches. Cate is forced to work with Ash, the man who broke her heart two years ago, while Liam and Sullivan resurface after years apart to deal with everything they'd left unsaid. Soon it's all-out war between the cartel and the mercenaries - with two couples caught in the middle of the blood feud.