In a future life, now in 1999, he's going to chase some terrorists on a time travel back to 1944. This will put him in contact again with the person he loved in his past life. They will then, without knowing, fight in two battles; one to stop the terrorists plans, and another one to deserve the right to live together, as they were always destined to.
What they do not know, is that the result of each one of these events, has a direct influence into the other one.
Nothing is what it seems in this story, and the end is very romantic and totally unexpected.