Vendetta — Tamara Hart Heiner

Only moments after the death of her ex-boyfriend, Jaci receives an intriguing offer: the chance to spend a week with her estranged father in Switzerland. Getting there takes some work, since she has to deceive her friends and family and sneak away. But once she's there, she realizes that was the easy part. Because her father's life is slightly less than kosher. Jaci finds herself entangled in a web of drug lords and sex traffickers. But the more she learns, the more she wants to fight next to her father and take them down. The only problem is, it might cost her life. Or worse, her identity.