In the year 2300, years after the end of WWII, the International Peace Union has brought all the nations together into a permanent stage of harmony - or so everyone thought. Calla Hartwell, proud daughter of the IPU's president, is thrown into the midst of chaos after a mysterious woman named Ezri threatens to destroy life as they know it. The IPU has only one solution: eliminate Ezri.

But there's a major problem; Ezri is from the future. To stop her, they must first identify her past self and get rid of her before she can become the world's enemy. And out of everyone, there is no one more willing to take her down than Calla.