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Ana, a former hotel worker, leaves her old life behind to join a group of girls living in a submarine on an island where war never ends. During her stay, Ana gains great instincts during the war. She starts to enjoy her free new life but soon discovers the truth behind the women: they send radio transmissions to war soldiers to lure them to their deaths and also kill other men to prove that women are not to be messed with. Disgusted, she realizes she is not a killer, and with the help of some soldiers she joins, she turns against the other women.