The human race stand on the brink of exinction as series of alien attacks decimate the planet.
Causing earthquakes , tsunamis and disease , separated from her family , ohio teenagar cassie sulivan will do whatever it takes to reunite with her brother sam fate leads her to form an alliace with evan walker a mysterious young man who may be her last hope forced to trust each other cassie and evan fight for survival during the fifth assault from the invaders.