A part-time student working at a resort restaurant in beautiful Italy is hired by her boss to be his fiancé for the holidays, so he can avoid getting married. Things get complicated when she begins to have genuine feelings for him.

Years after an alien invasion almost extinguished human mankind, refugee on a secret base on the Moon, three heroes decide to jump into a time travel in the desperate attempt to save the survivors but they don't know that the Sentinel is waiting for them.