In Longevity, Lucy Mendoza leads a team of scientists at the Prendergast Foundation who are testing an enzyme that might extend our lives by thirty years. For several reasons, the federal government, a major pharmaceutical company, and a billionaire investor have no qualms about eliminating Lucy to ensure that project will fail. Her former lover Grant Duran, an ex-Marine special ops officer who’s lost a hand and is now a molecular biologist, thwarts the first attempt on her life. As dead bodies accumulate and Lucy and Grant struggle to defend themselves, they begin to wonder whether the Longevity project should survive.