Milly is a soldier from 2084, where humanity is on the verge of extinction because of the "Daggra", an alien race. In mankind's final stronghold in, Milly leaps into a newly built time portal just before the fortress is overrun. The portal sends her to 2002, where her mission is to kill the first Daggra, who faked a crash landing, and stop him from signaling his invasion fleet.