Tara McCormick is sent to prison for the attempted murder of a local drug lord named Tommy Stompanato. Inside, she befriends Josie and is approached by a government agent to finish the job she started in exchange for her freedom.
Cruz Manuelos, a rough-around-the-edges but passionate young Marine, is recruited to join the CIA's Lioness Engagement Team to help bring down a terrorist organization from within. Joe, the station chief of the Lioness program, is tasked with training, managing and leading her female undercover operatives.