One hundred years after the Ceph where defeated, and humanity flourished with life when they discovered the true properties of mass effect fields, they set to the stars with the discovery of the Mass Relays. The legend that humanity had looked up to, the nano-suit wearing hero known as prophet, was however lost in space, and time.
The Citadel changed that legend, presuming that no legend existed and that no one is stronger than the council. They where stopped short however, when a human research team on Eden Prime discovered a metal man in the dirt, along with a Prothean beacon. Commander Shepherd and the SSV Normandy was sent to examine this man, along with the Prothean beacon.
They had no idea that this man was a piece of the key, to stopping one of the galaxy's greatest threats, once again... May god help them all...