The third film of this successful trilogy focuses on Captain Rose Corley (Lindsey Morgan), a human born with extraterrestrial superpowers that come with a price – she is the only person strong enough to beat the alien invaders but needs constant blood transfusions to stop her accelerated rate of aging. A long-time fighter against the invaders, Rose is now a fugitive on the run. Rose is plucked out of hiding by the military and once again asked to fight. Hybrid alien-humans that make up the majority of Earth’s population are about to turn rogue, falling under alien control. With only 72 hours to succeed, Rose is sent on a mission to the alien mothership to save humanity.