Seven of Nine (full Borg designation: Seven of Nine, Tertiary Adjunct of Unimatrix 01) was a human female who was a former Borg drone.
She was born Annika Hansen on stardate 25479 (2350), the daughter of eccentric exobiologists Magnus and Erin Hansen. She was assimilated by the Borg in 2356 at age six, along with her parents, but was liberated by the crew of the USS Voyagerin 2374. She joined the crew and returned to the Alpha Quadrant with the starship in 2378. Annika Hansen spent the next eighteen years of her life as a Borg drone, given the designation Seven of Nine.
As a drone, she assisted in the assimilation of millions, from individuals to entire species. She personally assimilated many individuals from a variety of species, including Humans, Klingons, Ferengi,Bajorans, Bolians, Krenim and Cardassians. In early 2368, Seven of Nine, along with three other drones in her unimatrix, crash-landed on a planet in the Delta Quadrant. The other drones, who were assimilated as adults, began to regain their identities upon being severed from the Borg Collective, but Seven was frightened as she knew nothing else but life as a drone. She forcibly linked the other drones together into a temporary collective in order to suppress their identities, and they were retrieved soon after. Seven of Nine remained a Borg drone until 2374, when she was liberated.
The transition back to Humanity was difficult for Seven of Nine. She appeared to accept her severance from the Collective, but tried to contact it at the first available opportunity. She was stopped, however. The Doctor, Voyager's holographic Chief Medical Officer, was able to remove most of her implants and restore most of her human appearance, but her long-term assimilation meant that some parts were vital to her survival and could not be removed. She also refused to be called by her name of Annika Hansen as Seven of Nine was the designation she had always known.
The Borg have travelled back in time to 2012
The Borg Queen and her drones have arrived on earth, with the single purpose of assimilating the entire human species. You will all become drones to serve the collective. You will be injected with nano probes and have cybernetic devices implanted in your eyes, ears and other organs and limbs!!
You must find all 3 humans who have become Borg and have escaped and been been severed from the collective, for only they know how to defeat the Borg Queen.